COVID-19Phase 4LUNARNCT05305651

Study to Monitor the Occurrence of Viral Variants in Patients With Compromised Immune Systems Being Treated for COVID-19

A Phase 4 study testing Sotrovimab in people with COVID-19, run by GlaxoSmithKline at 8 sites in United Kingdom.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record

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Trial summary

Who is it for?: Ages 18 years and older
Conditions the study is for: COVID-19
What is being tested?: Sotrovimab
Could I receive a placebo?: No, everyone receives an active treatment
How many people: 217 participants
Where: 8 sitesUnited Kingdom
Study dates: 1 Jul 2022to 19 Jul 2023
Phase: Phase 4
Are there results?: Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

Ages 18 years and older
All sexes
No healthy volunteers
Adult, Older adult

Who may be able to join

Participants must be adult and of greater than or equal to (>=) 18 years of age or older at the time of consent
Participants must be immunocompromised (IC) population eligible to receive sotrovimab
A positive polymerase chain reaction (PCR) or antigen test for SARS-CoV-2 through clinical testing or routine screening undertaken as part of clinical management
Prescribed treatment with sotrovimab as standard of clinical care
Able to provide informed consent and willing to adhere to study-related procedures

Who cannot join

Participants who require hospitalization (related or not to COVID-19) at baseline
Participants who initiated sotrovimab therapy in inpatient settings
Participants unable to perform nasal/oropharyngeal sample collection
Blinded participants from other COVID-19 related trials

Trial locations and contacts

8 sites in 1 country.

City, postcode or hospital

8 sites in 1 country

United Kingdom8 sites

GSK Investigational Site
Birmingham, B15 2GW
GSK Investigational Site
Cambridge, CB2 0QQ
GSK Investigational Site
Cardiff, CF14 4XW
GSK Investigational Site
London, NW1 2BU
GSK Investigational Site
London, SE1 7EH
GSK Investigational Site
Middlesbrough, TS4 3BW
GSK Investigational Site
Newcastle upon Tyne, NE1 4LP
GSK Investigational Site
Plymouth, PL6 5FP

Other trials in United Kingdom

About this study

Official title: Prospective Cohort Study to Monitor the Emergence of SARS-CoV-2 Spike Viral Variants in Immunocompromised Non-hospitalized Patients Exposed to Sotrovimab in Great Britain: LUNAR Study

Sotrovimab binds to a conserved epitope on the severe acute respiratory syndrome coronavirus (SARS-CoV) and SARS-CoV-2 spike protein outside the receptor-binding motif and has been shown to reduce the risk of hospitalization and/or death when administered as early treatment in non-hospitalized patients that are at risk for progression to severe disease. Immunocompromised (IC) patients are prioritized to receive early treatment for COVID-19 as they are at high risk of disease progression, and because of their potential for prolonged viral shedding and the resulting increased risk of emergent viral mutations and potential onward community transmission.

This genomic surveillance study will aim to describe changes in the SARS-CoV-2 spike protein observed in IC participants receiving sotrovimab as standard of clinical care in sentinel sites at a national level to assess potential emergence of viral variants.

Conditions: COVID-19
Being tested: Sotrovimab
Keywords: SARS CoV-2, LUNAR, Coronavirus disease 2019 (COVID-19), Pandemic, Sotrovimab, Monoclonal antibody, Immunocompromised (IC)
Medical subject headings: COVID-19

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

SotrovimabDrug
Sotrovimab dose and administration per standard of clinical care

Study groups in NCT05305651
Study group	Role	What they receive
Participants receiving Sotrovimab	Experimental	Immunocompromised non-hospitalized participants will receive sotrovimab as standard of clinical care for COVID-19 in sentinel sites Receives: Drug: Sotrovimab

What is being measured

The primary outcome is the main question the study is designed to answer.

Number of Participants With Treatment Emergent Amino Acid Substitutions Greater Than (>) 5 Percent (%) and >50% Allelic Frequency in the Sotrovimab Epitope at Day 7
SARS-CoV-2 spike analysis was carried out by nucleotide sequencing of the SARS-CoV-2 spike protein by Next generation sequencing (NGS) analysis of participant nasal/oropharyngeal swab samples. The nucleotide sequences were translated, and the amino acid (AA) sequences aligned and compared to a reference sequence. Treatment emergent (TE) substitutions are defined as AA differences in a post-Baseline sample that were not present at Baseline at the defined threshold for minority and consensus analysis. The epitope is part of the spike protein, and it was analyzed separately from the rest of spike. The number of participants with TE substitutions in the sotrovimab epitope reflects participants that had a TE change in the spike protein at the sotrovimab epitope position only. AA substitutions compared to the reference strain are presented at Day 7.
Measured: At Day 7
Number of Participants With Treatment Emergent Amino Acid Substitutions >5% and >50% Allelic Frequency in the Sotrovimab Epitope at Day 14
SARS-CoV-2 spike analysis was carried out by nucleotide sequencing of the SARS-CoV-2 spike protein by NGS analysis of participant nasal/oropharyngeal swab samples. The nucleotide sequences were translated, and AA sequences aligned and compared to a reference sequence. Treatment emergent (TE) substitutions are defined as AA differences in a post-Baseline sample that were not present at Baseline at the defined threshold for minority and consensus analysis. The epitope is part of the spike protein, and it was analyzed separately from the rest of spike. The number of participants with TE substitutions in the sotrovimab epitope reflects participants that had a TE change in the spike protein at the sotrovimab epitope position only. AA substitutions compared to the reference strain are presented at Day 14.
Measured: At Day 14
Number of Participants With Treatment Emergent Amino Acid Substitutions >5% and >50% Allelic Frequency in the Sotrovimab Epitope at Day 28
SARS-CoV-2 spike analysis was carried out by nucleotide sequencing of the SARS-CoV-2 spike protein by NGS analysis of participant nasal/oropharyngeal swab samples. The nucleotide sequences were translated, and AA sequences aligned and compared to a reference sequence. Treatment emergent (TE) substitutions are defined as AA differences in a post-Baseline sample that were not present at Baseline at the defined threshold for minority and consensus analysis. The epitope is part of the spike protein, and it was analyzed separately from the rest of spike. The number of participants with TE substitutions in the sotrovimab epitope reflects participants that had a TE change in the spike protein at the sotrovimab epitope position only. AA substitutions compared to the reference strain are presented at Day 28.
Measured: At Day 28
Number of Participants With Treatment Emergent Amino Acid Substitutions >5% and >50% Allelic Frequency in the Spike Protein at Day 7
SARS-CoV-2 spike analysis was carried out by nucleotide sequencing of the SARS-CoV-2 spike protein by NGS analysis of participant nasal/oropharyngeal swab samples. The nucleotide sequences were translated, and the AA sequences aligned and compared to a reference sequence. Treatment emergent (TE) substitutions are defined as AA differences in a post-Baseline sample that were not present at Baseline at the defined threshold for minority and consensus analysis. The number of participants with TE substitutions in the spike protein reflects participants that had a TE change in the spike protein at any position including the sotrovimab epitope. AA substitutions compared to the reference strain are presented at Day 7.
Measured: At Day 7
Number of Participants With Treatment Emergent Amino Acid Substitutions >5% and >50% Allelic Frequency in the Spike Protein at Day 14
SARS-CoV-2 spike analysis was carried out by nucleotide sequencing of the SARS-CoV-2 spike protein by NGS analysis of participant nasal/oropharyngeal swab samples. The nucleotide sequences were translated, and the AA sequences aligned and compared to a reference sequence. Treatment emergent (TE) substitutions are defined as AA differences in a post-Baseline sample that were not present at Baseline at the defined threshold for minority and consensus analysis. The number of participants with TE substitutions in the spike protein reflects participants that had a TE change in the spike protein at any position including the sotrovimab epitope. AA substitutions compared to the reference strain are presented at Day 14.
Measured: At Day 14
Number of Participants With Treatment Emergent Amino Acid Substitutions >5% and >50% Allelic Frequency in the Spike Protein at Day 28
SARS-CoV-2 spike analysis was carried out by nucleotide sequencing of the SARS-CoV-2 spike protein by NGS analysis of participant nasal/oropharyngeal swab samples. The nucleotide sequences were translated, and the AA sequences aligned and compared to a reference sequence. Treatment emergent (TE) substitutions are defined as AA differences in a post-Baseline sample that were not present at Baseline at the defined threshold for minority and consensus analysis. The number of participants with TE substitutions in the spike protein reflects participants that had a TE change in the spike protein at any position including the sotrovimab epitope. AA substitutions compared to the reference strain are presented at Day 28.
Measured: At Day 28

Secondary outcomes (11)

Number of Participants With Variants of Concern (VOC) or Variants Under Investigation (VUI)
SARS-CoV-2 VOC is defined by World health Organization(WHO) that meets definition of VUI and through a comparative assessment, has been demonstrated to be associated with 1 or more of following changes at degree of global public health(GPH) significance: increase in transmissibility or detrimental change in COVID-19 epidemiology, OR increase in virulence or change in clinical disease presentation, OR decrease in effectiveness of public health and social measures or available diagnostics, vaccines, therapeutics. SARS-CoV-2 VUI is defined by WHO as a variant:with genetic changes that are predicted or known to affect virus characteristics such as transmissibility, disease severity, immune, diagnostic or therapeutic escape and identified to cause significant community transmission or multiple COVID-19 clusters, in multiple countries with increasing relative prevalence alongside increasing number of cases over time, or other apparent epidemiological impacts to suggest emerging risk to GPH.
Measured: Up to Day 28
Number of Participants With Undetectable Virus by Reverse Transcriptase Polymerase Chain Reaction (RT-PCR)
The number of participants that had undetectable viral load in nasal/oropharyngeal swabs was determined by quantitative reverse transcription-polymerase chain reaction (qRT/PCR) at Day 7, Day 14, and Day 28. Participants with major protocol deviation (out of visit window/samples received late/return more samples than expected) at specific visits were excluded from analysis.
Measured: At Day 7, Day 14, and Day 28
Number of Participants With All Cause Hospital Stay
Number of participants hospitalized due to any cause have been reported.
Measured: Up to Day 28
Number of Participants With COVID-19 Related Hospital Stay
Number of participants hospitalized due to COVID-19 have been reported.
Measured: Up to Day 28
Number of Participants Requiring New or Increased Oxygen Support (Supplemental Oxygen [Not High Flow]), Non-invasive Ventilation or High-flow, Invasive Mechanical Ventilation or Extracorporeal Membrane Oxygenation (ECMO)
Number of participants required new or increased oxygen support (supplemental oxygen [not high flow]), non-invasive ventilation or high-flow, invasive mechanical ventilation or ECMO have been reported.
Measured: Up to Day 28
Number of Participants With All Cause Intensive Care Unit (ICU) Hospital Stay
Number of participants hospitalized in ICU due to any cause have been reported.
Measured: Up to Day 28
Number of Participants With COVID-19 Related ICU Hospital Stay
Number of participants hospitalized in ICU due to COVID-19 have been reported.
Measured: Up to Day 28
Number of Participants Who Died Due to Any Cause Through Day 28
Data for number of participants who died due to any cause through Day 28 have been reported.
Measured: Up to Day 28
Number of Participants Who Died Due to COVID-19 Through Day 28
Data for number of participants who died due to COVID-19 have been reported.
Measured: Up to Day 28
Number of Participants With Treatment-emergent Amino Acid Substitutions in the Spike Protein for Any Substitutions at Allelic Frequency >5%
SARS-CoV-2 spike analysis was carried out by nucleotide sequencing of the SARS-CoV-2 spike protein by NGS analysis of participant nasal/oropharyngeal swab samples for samples above the threshold for the sequencing assay. The nucleotide sequences were translated, and the AA sequences aligned and compared to a reference sequence. For samples with AA changes above the >5% threshold for allelic frequency determination, AA changes in SARS-CoV-2 spike protein compared to Baseline was reported. One participant may have more than one substitution under the same codon. Treatment Emergent Substitutions included participants where a Baseline and post-Baseline records exist. All type of AA mutations have been categorized.
Measured: At Day 7, Day 14 and Day 28
Number of Participants With Treatment-emergent Amino Acid Substitutions in the Spike Protein for Any Substitutions at Allelic Frequency >50%
SARS-CoV-2 spike analysis was carried out by nucleotide sequencing of the SARS-CoV-2 spike protein by NGS analysis of participant nasal/oropharyngeal swab samples for samples with viral load above the threshold of the sequencing assay. The nucleotide sequences were translated, and the AA sequences aligned and compared to a reference sequence. For samples with AA changes above the threshold for consensus sequence generation that were not present in the Baseline sequence, AA changes in the SARS-CoV-2 spike protein consensus sequence (>50%) from Baseline was reported. One participant may have more than one substitution under the same codon. Treatment Emergent Substitutions included participants where a Baseline and post-Baseline records exist. All type of AA mutations have been categorized.
Measured: At Day 7, Day 14 and Day 28

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

1 Jul 202219 Jul 2023

First posted31 Mar 2022
Study start1 Jul 2022
Primary completion17 Jul 2023
Study completion19 Jul 2023

Resources

Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
Publications (1)Papers the sponsor has linked to this study.
Other trials for COVID-19Studies of the same condition, open and under way.
More trials run by GlaxoSmithKlineThe sponsor's other registered studies.
What the trial phases meanHow a treatment moves from first tests in people to approval.

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design

Study type: Interventional
Phase: Phase 4
Primary purpose: Treatment
Allocation: Not applicable
Intervention model: Single group
Model description: This study is a prospective cohort study which will enroll IC non-hospitalized participants receiving sotrovimab treatment as per standard of clinical care for COVID-19 in sentinel sites.
Masking: None (open label)
Enrolment: 217 participants (actual)

IDs, dates and publications

ClinicalTrials.gov ID: NCT05305651
Sponsor's protocol ID: 218407
Acronym: LUNAR
Status last verified: Sep 2026
First submitted: 30 Mar 2022
Last updated: 6 Oct 2026
Results posted: Yes, on ClinicalTrials.gov
Data monitoring committee: No
FDA-regulated drug: No
FDA-regulated device: No
Individual data sharing: Yes: Study Sponsor will assess requests from qualified researchers for anonymized individual patient-level data and related study documents. Data sharing is subject to certain criteria, conditions, and exceptions. For further information, refer to https://www.gsk-studyregister.com/About\_GSK\_Patient\_Level\_Data\_Sharing\_Final\_13July2023.pdf

Publications

Breuer J, Drysdale M, Walker J, Han J, Aylott A, Van Dyke MK, Birch HJ, McKie E, Jordan W, Gemzoe K, Gillespie IA, Bethune C, Williams CA, Underwood J, Goodman AL, Brown M, Brown JR, Williams R, Bernal LMM, Buggiotti L, Gkrania-Klotsas E, Green C, Hunter E, Miller C, Skingsley A, Lowe DM. Monitoring the emergence of resistance with sotrovimab in immunocompromised patients with COVID-19: LUNAR study. J Infect. 2025 Jul;91(1):106510. doi: 10.1016/j.jinf.2025.106510. Epub 2025 May 19.
PubMed 40398499

Want to know more?

The sponsor has not listed a contact. The official record may have more details.

Talk to your doctor first and take this page with you. Only the study team can confirm whether you can join.

Questions to ask the study team

What is the study trying to find out?
What would I need to do, and how often would I visit?
Could I receive a placebo instead of the treatment?
What are the possible risks and benefits for me?
Will it cost me anything? Are travel or time paid for?
Can I keep seeing my own doctor during the study?
What happens when the study ends?

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Study at a glance

From the registry record, last updated by the sponsor on 6 Oct 2026. Recruitment status is as the sponsor reported it: confirm with the study team.

Official title: Prospective Cohort Study to Monitor the Emergence of SARS-CoV-2 Spike Viral Variants in Immunocompromised Non-hospitalized Patients Exposed to Sotrovimab in Great Britain: LUNAR Study
ClinicalTrials.gov ID: NCT05305651
Acronym / sponsor ID: LUNAR / 218407
Conditions: COVID-19
Keywords: SARS CoV-2, LUNAR, Coronavirus disease 2019 (COVID-19), Pandemic, Sotrovimab, Monoclonal antibody, Immunocompromised (IC)
Phase: Phase 4
Study type: Interventional
Recruitment status: Completed
Enrolment: 217 participants (actual)
Lead sponsor: GlaxoSmithKlineIndustry (pharma, biotech, devices)
Study start: 1 Jul 2022 (actual)
Primary completion: 17 Jul 2023 (actual)
Study completion: 19 Jul 2023 (actual)
First posted: 31 Mar 2022 (actual)
Results: Posted 15 Oct 2024

Clinical summary

The research question as the sponsor registered it. This describes what the study plans to test, not what it found.

Study design

Primary purpose: Treatment
Allocation: Not applicable
Intervention model: Single group
Masking: None (open label)
Number of arms: 1
Model description: This study is a prospective cohort study which will enroll IC non-hospitalized participants receiving sotrovimab treatment as per standard of clinical care for COVID-19 in sentinel sites.

Arm	Type	Receives
Participants receiving Sotrovimab	Experimental	Drug: SotrovimabImmunocompromised non-hospitalized participants will receive sotrovimab as standard of clinical care for COVID-19 in sentinel sites

Who may qualify

Ages: 18 years and older
Sex: All
Healthy volunteers: Not accepted
Age groups: Adult, Older adult

Key inclusion criteria (5 listed)

Participants must be adult and of greater than or equal to (>=) 18 years of age or older at the time of consent
Participants must be immunocompromised (IC) population eligible to receive sotrovimab
A positive polymerase chain reaction (PCR) or antigen test for SARS-CoV-2 through clinical testing or routine screening undertaken as part of clinical management
Prescribed treatment with sotrovimab as standard of clinical care
Able to provide informed consent and willing to adhere to study-related procedures

Key exclusion criteria (4 listed)

Participants who require hospitalization (related or not to COVID-19) at baseline
Participants who initiated sotrovimab therapy in inpatient settings
Participants unable to perform nasal/oropharyngeal sample collection
Blinded participants from other COVID-19 related trials

Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.

Interventions

Intervention	Type	Arms
SotrovimabSotrovimab dose and administration per standard of clinical care	Drug	Participants receiving Sotrovimab

Primary outcome

Number of Participants With Treatment Emergent Amino Acid Substitutions Greater Than (>) 5 Percent (%) and >50% Allelic Frequency in the Sotrovimab Epitope at Day 7
Time frame: At Day 7
SARS-CoV-2 spike analysis was carried out by nucleotide sequencing of the SARS-CoV-2 spike protein by Next generation sequencing (NGS) analysis of participant nasal/oropharyngeal swab samples. The nucleotide sequences were translated, and the amino acid (AA) sequences aligned and compared to a reference sequence. Treatment emergent (TE) substitutions are defined as AA differences in a post-Baseline sample that were not present at Baseline at the defined threshold for minority and consensus analysis. The epitope is part of the spike protein, and it was analyzed separately from the rest of spike. The number of participants with TE substitutions in the sotrovimab epitope reflects participants that had a TE change in the spike protein at the sotrovimab epitope position only. AA substitutions compared to the reference strain are presented at Day 7.
Number of Participants With Treatment Emergent Amino Acid Substitutions >5% and >50% Allelic Frequency in the Sotrovimab Epitope at Day 14
Time frame: At Day 14
SARS-CoV-2 spike analysis was carried out by nucleotide sequencing of the SARS-CoV-2 spike protein by NGS analysis of participant nasal/oropharyngeal swab samples. The nucleotide sequences were translated, and AA sequences aligned and compared to a reference sequence. Treatment emergent (TE) substitutions are defined as AA differences in a post-Baseline sample that were not present at Baseline at the defined threshold for minority and consensus analysis. The epitope is part of the spike protein, and it was analyzed separately from the rest of spike. The number of participants with TE substitutions in the sotrovimab epitope reflects participants that had a TE change in the spike protein at the sotrovimab epitope position only. AA substitutions compared to the reference strain are presented at Day 14.
Number of Participants With Treatment Emergent Amino Acid Substitutions >5% and >50% Allelic Frequency in the Sotrovimab Epitope at Day 28
Time frame: At Day 28
SARS-CoV-2 spike analysis was carried out by nucleotide sequencing of the SARS-CoV-2 spike protein by NGS analysis of participant nasal/oropharyngeal swab samples. The nucleotide sequences were translated, and AA sequences aligned and compared to a reference sequence. Treatment emergent (TE) substitutions are defined as AA differences in a post-Baseline sample that were not present at Baseline at the defined threshold for minority and consensus analysis. The epitope is part of the spike protein, and it was analyzed separately from the rest of spike. The number of participants with TE substitutions in the sotrovimab epitope reflects participants that had a TE change in the spike protein at the sotrovimab epitope position only. AA substitutions compared to the reference strain are presented at Day 28.
Number of Participants With Treatment Emergent Amino Acid Substitutions >5% and >50% Allelic Frequency in the Spike Protein at Day 7
Time frame: At Day 7
SARS-CoV-2 spike analysis was carried out by nucleotide sequencing of the SARS-CoV-2 spike protein by NGS analysis of participant nasal/oropharyngeal swab samples. The nucleotide sequences were translated, and the AA sequences aligned and compared to a reference sequence. Treatment emergent (TE) substitutions are defined as AA differences in a post-Baseline sample that were not present at Baseline at the defined threshold for minority and consensus analysis. The number of participants with TE substitutions in the spike protein reflects participants that had a TE change in the spike protein at any position including the sotrovimab epitope. AA substitutions compared to the reference strain are presented at Day 7.
Number of Participants With Treatment Emergent Amino Acid Substitutions >5% and >50% Allelic Frequency in the Spike Protein at Day 14
Time frame: At Day 14
SARS-CoV-2 spike analysis was carried out by nucleotide sequencing of the SARS-CoV-2 spike protein by NGS analysis of participant nasal/oropharyngeal swab samples. The nucleotide sequences were translated, and the AA sequences aligned and compared to a reference sequence. Treatment emergent (TE) substitutions are defined as AA differences in a post-Baseline sample that were not present at Baseline at the defined threshold for minority and consensus analysis. The number of participants with TE substitutions in the spike protein reflects participants that had a TE change in the spike protein at any position including the sotrovimab epitope. AA substitutions compared to the reference strain are presented at Day 14.
Number of Participants With Treatment Emergent Amino Acid Substitutions >5% and >50% Allelic Frequency in the Spike Protein at Day 28
Time frame: At Day 28
SARS-CoV-2 spike analysis was carried out by nucleotide sequencing of the SARS-CoV-2 spike protein by NGS analysis of participant nasal/oropharyngeal swab samples. The nucleotide sequences were translated, and the AA sequences aligned and compared to a reference sequence. Treatment emergent (TE) substitutions are defined as AA differences in a post-Baseline sample that were not present at Baseline at the defined threshold for minority and consensus analysis. The number of participants with TE substitutions in the spike protein reflects participants that had a TE change in the spike protein at any position including the sotrovimab epitope. AA substitutions compared to the reference strain are presented at Day 28.

11 secondary outcomes

Number of Participants With Variants of Concern (VOC) or Variants Under Investigation (VUI)
Time frame: Up to Day 28
Number of Participants With Undetectable Virus by Reverse Transcriptase Polymerase Chain Reaction (RT-PCR)
Time frame: At Day 7, Day 14, and Day 28
Number of Participants With All Cause Hospital Stay
Time frame: Up to Day 28
Number of Participants With COVID-19 Related Hospital Stay
Time frame: Up to Day 28
Number of Participants Requiring New or Increased Oxygen Support (Supplemental Oxygen [Not High Flow]), Non-invasive Ventilation or High-flow, Invasive Mechanical Ventilation or Extracorporeal Membrane Oxygenation (ECMO)
Time frame: Up to Day 28
Number of Participants With All Cause Intensive Care Unit (ICU) Hospital Stay
Time frame: Up to Day 28
Number of Participants With COVID-19 Related ICU Hospital Stay
Time frame: Up to Day 28
Number of Participants Who Died Due to Any Cause Through Day 28
Time frame: Up to Day 28
Number of Participants Who Died Due to COVID-19 Through Day 28
Time frame: Up to Day 28
Number of Participants With Treatment-emergent Amino Acid Substitutions in the Spike Protein for Any Substitutions at Allelic Frequency >5%
Time frame: At Day 7, Day 14 and Day 28
Number of Participants With Treatment-emergent Amino Acid Substitutions in the Spike Protein for Any Substitutions at Allelic Frequency >50%
Time frame: At Day 7, Day 14 and Day 28

Results and safety

Results posted to the registry on 15 Oct 2024, as reported by the sponsor. Figures are copied from the record, not re-analysed. Full results on ClinicalTrials.gov.

Participant flow

Group	Started	Completed
Sotrovimab 500 mg IV	217	208

Primary outcome: Number of Participants With Treatment Emergent Amino Acid Substitutions Greater Than (>) 5 Percent (%) and >50% Allelic Frequency in the Sotrovimab Epitope at Day 7

Time frame: At Day 7. Count of participants. Unit: Participants

Measure	Sotrovimab 500 mg IV n = 153
AA substitutions >5% allelic frequency	38
AA substitutions >50% allelic frequency	12

Population analysed: The Safety Set included all participants who were enrolled and exposed to study intervention. Only those participants with Paired Sequences were included in the analysis. Only those participants who were measured and analyzed (i.e., contributed data reported in the table) were included in the Overall Number of Participants Analyzed field.

Primary outcome: Number of Participants With Treatment Emergent Amino Acid Substitutions >5% and >50% Allelic Frequency in the Sotrovimab Epitope at Day 14

Time frame: At Day 14. Count of participants. Unit: Participants

Measure	Sotrovimab 500 mg IV n = 71
AA substitutions >5% allelic frequency	18
AA substitutions >50% allelic frequency	11

Primary outcome: Number of Participants With Treatment Emergent Amino Acid Substitutions >5% and >50% Allelic Frequency in the Sotrovimab Epitope at Day 28

Time frame: At Day 28. Count of participants. Unit: Participants

Measure	Sotrovimab 500 mg IV n = 33
AA substitutions >5% allelic frequency	11
AA substitutions >50% allelic frequency	11

Primary outcome: Number of Participants With Treatment Emergent Amino Acid Substitutions >5% and >50% Allelic Frequency in the Spike Protein at Day 7

Time frame: At Day 7. Count of participants. Unit: Participants

Measure	Sotrovimab 500 mg IV n = 153
AA substitutions >5% allelic frequency	88
AA substitutions >50% allelic frequency	19

11 secondary outcomes are reported in the full results.

Adverse events

Time frame: Up to Day 28. Other adverse events reported at 0% frequency or more

Group	Serious adverse events	Other adverse events	Deaths
Sotrovimab 500 mg IV	0 of 217 (0%)	6 of 217 (2.8%)	1 of 217

Loading the posted results from ClinicalTrials.gov…

Research links

Official record on ClinicalTrials.govLast updated by the sponsor 6 Oct 2026.
Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
Background: PubMed 40398499Breuer J, Drysdale M, Walker J, Han J, Aylott A, Van Dyke MK, Birch HJ, McKie E, Jordan W, Gemzoe K, Gillespie IA, Bethune C, Williams CA, Underwood J, Goodman AL, Brown M, Brown JR, Williams R, Bernal LMM, Buggiotti L, Gkrania-Klotsas E, Green C, Hunter E, Miller C, Skingsley A, Lowe DM. Monitoring the emergence of resistance with sotrovimab in immunocompromised patients with COVID-19: LUNAR study. J Infect. 2025 Jul;91(1):106510. doi: 10.1016/j.jinf.2025.106510. Epub 2025 May 19.
Individual participant dataSharing planned: Yes. Study Sponsor will assess requests from qualified researchers for anonymized individual patient-level data and related study documents. Data sharing is subject to certain criteria, conditions, and exceptions. For further information, refer to https://www.gsk-studyregister.com/About_GSK_Patient_Level_Data_Sharing_Final_13July2023.pdf

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Referral and contact

AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.

GSK Clinical Trials study director

GlaxoSmithKline

8 sites in 1 country: see every site and its status.

Questions about this trial

What is this clinical trial studying?

A Phase 4 study testing Sotrovimab in people with COVID-19, run by GlaxoSmithKline at 8 sites in United Kingdom.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 5 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 6 Oct 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 8 sites in United Kingdom. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 4 studies take place after a treatment is approved, to learn more about its long-term benefits and risks in everyday use.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 15 Oct 2024). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Number of Participants With Treatment Emergent Amino Acid Substitutions Greater Than (>) 5 Percent (%) and >50% Allelic Frequency in the Sotrovimab Epitope at Day 7 (time frame: At Day 7). The study lists 6 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT05305651, which also lists 1 linked publication.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 6 Oct 2026.