PASC Post Acute Sequelae of COVID-19NCT06577467
Cross-Sectional Evaluation of Persistence of SARS-CoV-2 Remnants After Recovery From Acute Infection
An observational study of PASC Post Acute Sequelae of COVID-19, run by National Institute of Neurological Disorders and Stroke (NINDS) at 1 site in United States.
Trial summary
Background: SARS-CoV-2 is the virus that causes COVID-19. Some people who recover from COVID-19 have symptoms that last long after the active infection ends. This is called "long COVID." Sometimes, long COVID can affect the nerves and cause problems with sleep, thinking, the senses, and movement. Read more about this study
- Who is it for?
- Ages 18 to 110 yearsHealthy volunteers can take part
- Conditions the study is for
- PASC Post Acute Sequelae of COVID-19
- How many people
- 12 participants
- Where
- 1 siteUnited States
- Study dates
- 27 Mar 2025to 1 Sep 2027
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
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 to 110 years
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Study population: 6 neuro-PASC patients with: 1. Neurologic and neuropsychiatric complaint is the primary clinical issue. 2. Neuro-PASC clinical symptom burden is moderate or greater. 3. Other PASC complications, such as pulmonary, cardiovascular, or gastrointestinal symptoms, are not prominent case features. 6 Recovered volunteers with: 1. Reports no ongoing or new health issues attributable to a SARS-CoV-2 infection 2. Overall clinical symptoms burden is no greater than mild 3. No clinically substantial comorbid medical or psychiatric conditions
Who may be able to join
- Recovered Volunteers (RV): Six healthy persons who have recovered from an acute SARS-CoV-2 infection.
- Participants 18 and older
- Ability to provide informed consent
- Completed participation in Phase B of Protocol 000089
- Met 000089 Inclusion criteria for Mild to Moderate COVID-19 without PASC symptoms:
- Licensed Independent Practitioner documentation of a stable state of general well-health and physical function prior to contracting SARS-CoV-2. This may include medical records, correspondence letters, or information gathered from telephone calls with study personnel.
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- A self-reported illness narrative of recovery to prior health after a SARS/CoV2 infection.
- Laboratory documentation of a positive COVID-19 PCR, NAA, or other EUA Approved test to confirm active COVID infection at the time of the SARS-CoV-2 infection. Participants with positive home tests during Phase A will be required to have a positive anti-SARS nucleocapsid antibody test.
- Meets WHO Clinical Progression Scale of 2 - 6:
- 2: Ambulatory; symptomatic, independent
- 3: Ambulatory; symptomatic, assistance needed
- 4: Hospitalized; no oxygen therapy
- 5: Hospitalized; oxygen by mask or nasal prongs
- 6: Hospitalized; oxygen by non-invasive ventilation or high flow oxygen
- Functional Criteria: No substantial symptom severity as determined using SF-36v2: score of >=85 physical function subscale, and >=85 on role physical subscale, and >=85 on social function subscale.
- Determined to be a Healthy Comparator by the 000089 Case Adjudication Committee
- Does not have an active SARS-CoV-2 infection. The protocol will conform with NIH CC standards for documenting a participant does not have active SARS-CoV-2 infection. This may include screening interviews and/or testing. Testing may be repeated with each admission. Participants may be rescreened 6 weeks after acute infection has resolved.
- Neurologic Post-Acute Sequelae of COVID-19 Participants (Neuro-PASC):
- Six persons with ongoing neurological complaints following an acute SARS-CoV-2 infection.
- Participants 18 and older
- Ability to provide informed consent
- Completed participation in Phase B of Protocol 000089
- Met 000089 Inclusion criteria for Mild to Moderate COVID-19 with PASC symptoms:
- Licensed Independent Practitioner documentation of a stable state of general well-health and physical function prior to contracting SARS-CoV-2. This may include medical records, correspondence letters, or information gathered from telephone calls with study personnel.
- A self-reported illness narrative of the development of persistent PASC symptoms after recovering from a SARS-CoV-2 infection. These include symptoms such as fatigue, cognitive difficulties, orthostatic intolerance, unrefreshing sleep, neuropathic pain, mood change, and post-exertional malaise.
- Laboratory documentation of a positive COVID-19 PCR, NAA, or other EUA Approved test to confirm active COVID infection at the time of the SARS-CoV-2 infection. Participants with positive home tests during Phase A will be required to have a positive anti-SARS nucleocapsid antibody test .
- Meets WHO Clinical Progression Scale of 2 - 6:
- 2: Ambulatory; symptomatic, independent
- 3: Ambulatory; symptomatic, assistance needed
- 4: Hospitalized; no oxygen therapy
- 5: Hospitalized; oxygen by mask or nasal prongs
- 6: Hospitalized; oxygen by non-invasive ventilation or high flow oxygen
- Functional Criteria: Substantial symptom severity as determined using SF-36v2: score of <= 70 physical function subscale, or <=50 on role physical subscale, or <=75 on social function subscale.
- Determined to have Post-Acute Sequelae of COVID-19 by the 000089 Case Adjudication Committee
- Primary PASC complaint is neurologic including:
- Neuropathic sensations
- Cognitive complaints
- Postural (Orthostatic) complaints
- Motor complaints
- Does not have an active SARS-CoV-2 infection. The protocol will conform with NIH CC standards for documenting a participant does not have active SARS-CoV-2 infection. This may include screening interviews and/or testing. Testing may be repeated with each admission. Participants may be rescreened 6 weeks after acute infection has resolved.
Who cannot join
- Current suicidal ideation
- Women who are pregnant, breastfeeding, or are within one-year post-partum.
- Current or previous malignancy. A history of malignancy that has fully resolved with surgical resection only (e.g. no chemotherapy, radiation therapy, or immunotherapy) will be allowed.
- Current systemic immunologic disorders (e.g. Type 1 diabetes, rheumatoid arthritis). Local immunological disorder (e.g. atopic dermatitis, stable autoimmune thyroid disease) and allergic disorders will be allowed.
- Current or previous long-term immune suppressive therapy. Systemic steroid use, even short-term, must not have been used within the month prior to enrollment.
- Long term use of anticoagulant or antiplatelet medications.
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- Active participation in a clinical protocol (e.g. anti-inflammatory drug intervention study) which includes an intervention that may affect the results of the current study.
- Not willing to allow for research data and samples to be shared broadly with other researchers.
- Employees of NIH.
- Symptom severity that makes it impossible for the volunteer to travel to NIH for an extended inpatient evaluation
- Use of medications with a high-risk for withdrawal-related complications (i.e. long-acting opiates or benzodiazepines).
- Unwillingness to co-enroll in protocol 17-I-0122: NIAID Centralized Sequencing Protocol.
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
United States1 site, 1 recruiting
- Recruiting
National Institutes of Health Clinical Center
Bethesda, Maryland, 20892
Avindra Nath, M.D., 301-496-1561, natha@mail.nih.gov
About this study
Background:
SARS-CoV-2 is the virus that causes COVID-19. Some people who recover from COVID-19 have symptoms that last long after the active infection ends. This is called "long COVID." Sometimes, long COVID can affect the nerves and cause problems with sleep, thinking, the senses, and movement. Researchers want to find out whether people with long COVID have retained inactive remnants of SARS-CoV-2 in their bodies.
Read more
Objective:
To collect tissue samples to see if people with long COVID have remnants of SARS-CoV-2 in their bodies.
Eligibility:
People 18 years or older who have recovered from COVID-19, both with and without neurologic symptoms.
Design:
Participants will have 2 to 6 inpatient or outpatient visits over 4 months. Each visit will last 4 to 5 days.
Participants will be screened to make sure it is safe to collect tissue samples from their body. They will have a physical and dental exam. They will have imaging scans and a test of their heart function. They will complete questionnaires about their health. They will give blood, urine, saliva, and stool samples. Their sense of taste and smell will be tested.
Tissue samples will be taken from the digestive tract, lungs, colon, skin, muscle, lymph nodes, nasal passages, and mouth. Participants may be numbed or sedated for some of the procedures.
Swabs will be used to collect cells from inside the mouth and nose.
Participants will undergo lumbar puncture. A thin needle will be inserted into their lower back to draw out a sample of the fluid around their spinal cord.
Participants will have follow-up phone calls after each clinic visit.
Read the detailed description
Study Description:
It has been demonstrated that remnants of the SARS-CoV-2 virus remain after the resolution of the acute infective period. It is not known if these viral remnants interact with host tissues in the development and maintenance of the Post-Acute Sequelae of COVID-19 (PASC)/Long COVID. Better understanding of how to recover and characterize SARS-CoV-2 viral remnants from humans is a valuable first step in understanding the health impact that they may have on humans. This study will focus on the recovery and characterization of SARS-CoV-2 remnants from multiple organ sites of individual volunteers with persistent neurological complications from SARS-CoV-2 (Neuro-PASC) and volunteers those who have recovered from a SARS-CoV-2 infection (RV).
Objectives:
- Primary Objective: --To determine where remnants of SARS-CoV-2 virus can be recovered in persons with neuro-PASC and RVs.
- Secondary Objectives:
- To characterize the biochemical nature of SARS-CoV-2 recovered viral remnants (e.g. proteins, nucleic acids).
- To determine if there are quantitative differences in recovered SARS-CoV-2 proteins between neuro-PASC and RV participants.
- To determine if there are quantitative differences in recovered SARS-CoV-2 nucleic acids between neuro-PASC and RV participants.
Endpoints:
This is an exploratory cross-sectional protocol to determine whether the presence or absence of viral remnants can be detected in a range of human tissues. Hence, tissue-specific detection of viral remnants is the primary end point. Secondary endpoints will characterize and quantify the recovered remnants to allow group comparisons between neuro-PASC and RV participants.
- Conditions
- PASC Post Acute Sequelae of COVID-19
- Keywords
- PASC, COVID-19
- Medical subject headings
- Post-Acute COVID-19 Syndrome, COVID-19
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
| Study group | Role | What they receive |
|---|---|---|
| Neuro-PASC | 1.<TAB>Neurologic and neuropsychiatric complaint is the primary clinical issue. 2.<TAB>Neuro-PASC clinical symptom burden is moderate or greater.3.<TAB>Other PASC complications, such as pulmonary, cardiovascular, or gastrointestinal symptoms, are not prominent case features. | |
| Recovered volunteers | 1.<TAB>Reports no ongoing or new health issues attributable to a SARS-CoV-2 infection2.<TAB>Overall clinical symptoms burden is no greater than mild3.<TAB>No clinically substantial comorbid medical or psychiatric conditions |
What is being measured
The primary outcome is the main question the study is designed to answer.
To determine where remnants of SARS-CoV-2 virus can be recovered in persons with neuro-PASC and RVs.
This is an exploratory study to determine where SARS-CoV-2 viral remnants can be recovered in tissues of patients with Neuro-PASC.
Measured: Study End
Secondary outcomes (3)
1.To characterize the biochemical nature of SARS-CoV-2 recovered viral remnants (e.g. proteins, nucleic acids).PASC and RV participants.
If defective or restricted viral replication is present in the tissues, one might not detect fully replicating virus or all viral components. It is not known if SARS-CoV-2 proteins or RNA preferentially resides in particular tissue types.
Measured: Study End
2.To determine if there are quantitative differences in recovered SARS-CoV-2 proteins between neuro-PASC and RV participants.
If defective or restricted viral replication is present in the tissues, one might not detect fully replicating virus or all viral components. It is not known if SARS-CoV-2 proteins or RNA preferentially resides in particular tissue types.
Measured: Study End
3.To determine if there are quantitative differences in recovered SARS-CoV-2 nucleic acids between neuro-PASC and RV participants.
If defective or restricted viral replication is present in the tissues, one might not detect fully replicating virus or all viral components. It is not known if SARS-CoV-2 proteins or RNA preferentially resides in particular tissue types.
Measured: Study End
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted29 Aug 2024
- Study start27 Mar 2025
- Primary completion1 Sep 2027 (estimated)
- Study completion1 Sep 2027 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for PASC Post Acute Sequelae of COVID-19Studies of the same condition, open and under way.
- More trials run by National Institute of Neurological Disorders and Stroke (NINDS)The 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
- Observational
- Observational model
- Case-control
- Time perspective
- Cross-sectional
- Enrolment
- 12 participants (estimated)
Sponsor and investigators
- Sponsor type
- US National Institutes of Health
- Responsible party
- Sponsor
- Investigators
- Avindra Nath, M.D., Principal investigator, National Institute of Neurological Disorders and Stroke (NINDS)
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06577467
- Sponsor's protocol ID
- 10002067
- Other IDs
- 002067-N
- Status last verified
- 4 Aug 2026
- First submitted
- 28 Aug 2024
- Last updated
- 16 Sep 2026
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Yes: All collected IPD will be shared that underlie results in a publication.
Study at a glance
From the registry record, last updated by the sponsor on 16 Sep 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Cross-Sectional Evaluation of Persistence of SARS-CoV-2 Remnants After Recovery From Acute Infection
- ClinicalTrials.gov ID
- NCT06577467
- Acronym / sponsor ID
- 10002067
- Conditions
- PASC Post Acute Sequelae of COVID-19
- Keywords
- PASC, COVID-19
- Study type
- Observational
- Recruitment status
- Recruiting
- Enrolment
- 12 participants (estimated)
- Lead sponsor
- National Institute of Neurological Disorders and Stroke (NINDS)US National Institutes of Health
- Study start
- 27 Mar 2025 (actual)
- Primary completion
- 1 Sep 2027 (estimated)
- Study completion
- 1 Sep 2027 (estimated)
- First posted
- 29 Aug 2024 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Background:
SARS-CoV-2 is the virus that causes COVID-19. Some people who recover from COVID-19 have symptoms that last long after the active infection ends. This is called "long COVID." Sometimes, long COVID can affect the nerves and cause problems with sleep, thinking, the senses, and movement. Researchers want to find out whether people with long COVID have retained inactive remnants of SARS-CoV-2 in their bodies.
Objective:
To collect tissue samples to see if people with long COVID have remnants of SARS-CoV-2 in their bodies.
Eligibility:
People 18 years or older who have recovered from COVID-19, both with and without neurologic symptoms.
Design:
Participants will have 2 to 6 inpatient or outpatient visits over 4 months. Each visit will last 4 to 5 days.
Participants will be screened to make sure it is safe to collect tissue samples from their body. They will have a physical and dental exam. They will have imaging scans and a test of their heart function. They will complete questionnaires about their health. They will give blood, urine, saliva, and stool samples. Their sense of taste and smell will be tested.
Tissue samples will be taken from the digestive tract, lungs, colon, skin, muscle, lymph nodes, nasal passages, and mouth. Participants may be numbed or sedated for some of the procedures.
Swabs will be used to collect cells from inside the mouth and nose.
Participants will undergo lumbar puncture. A thin needle will be inserted into their lower back to draw out a sample of the fluid around their spinal cord.
Participants will have follow-up phone calls after each clinic visit.
Detailed description
Study Description:
It has been demonstrated that remnants of the SARS-CoV-2 virus remain after the resolution of the acute infective period. It is not known if these viral remnants interact with host tissues in the development and maintenance of the Post-Acute Sequelae of COVID-19 (PASC)/Long COVID. Better understanding of how to recover and characterize SARS-CoV-2 viral remnants from humans is a valuable first step in understanding the health impact that they may have on humans. This study will focus on the recovery and characterization of SARS-CoV-2 remnants from multiple organ sites of individual volunteers with persistent neurological complications from SARS-CoV-2 (Neuro-PASC) and volunteers those who have recovered from a SARS-CoV-2 infection (RV).
Objectives:
- Primary Objective: --To determine where remnants of SARS-CoV-2 virus can be recovered in persons with neuro-PASC and RVs.
- Secondary Objectives:
- To characterize the biochemical nature of SARS-CoV-2 recovered viral remnants (e.g. proteins, nucleic acids).
- To determine if there are quantitative differences in recovered SARS-CoV-2 proteins between neuro-PASC and RV participants.
- To determine if there are quantitative differences in recovered SARS-CoV-2 nucleic acids between neuro-PASC and RV participants.
Endpoints:
This is an exploratory cross-sectional protocol to determine whether the presence or absence of viral remnants can be detected in a range of human tissues. Hence, tissue-specific detection of viral remnants is the primary end point. Secondary endpoints will characterize and quantify the recovered remnants to allow group comparisons between neuro-PASC and RV participants.
Study design
- Observational model
- Case-control
- Time perspective
- Cross-sectional
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Neuro-PASC | – | –1.<TAB>Neurologic and neuropsychiatric complaint is the primary clinical issue. 2.<TAB>Neuro-PASC clinical symptom burden is moderate or greater.3.<TAB>Other PASC complications, such as pulmonary, cardiovascular, or gastrointestinal symptoms, are not prominent case features. |
| Recovered volunteers | – | –1.<TAB>Reports no ongoing or new health issues attributable to a SARS-CoV-2 infection2.<TAB>Overall clinical symptoms burden is no greater than mild3.<TAB>No clinically substantial comorbid medical or psychiatric conditions |
Who may qualify
- Ages
- 18 to 110 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
- Study population
- 6 neuro-PASC patients with: 1. Neurologic and neuropsychiatric complaint is the primary clinical issue. 2. Neuro-PASC clinical symptom burden is moderate or greater. 3. Other PASC complications, such as pulmonary, cardiovascular, or gastrointestinal symptoms, are not prominent case features. 6 Recovered volunteers with: 1. Reports no ongoing or new health issues attributable to a SARS-CoV-2 infection 2. Overall clinical symptoms burden is no greater than mild 3. No clinically substantial comorbid medical or psychiatric conditions
Key inclusion criteria (40 listed)
- Recovered Volunteers (RV): Six healthy persons who have recovered from an acute SARS-CoV-2 infection.
- Participants 18 and older
- Ability to provide informed consent
- Completed participation in Phase B of Protocol 000089
- Met 000089 Inclusion criteria for Mild to Moderate COVID-19 without PASC symptoms:
Key exclusion criteria (12 listed)
- Current suicidal ideation
- Women who are pregnant, breastfeeding, or are within one-year post-partum.
- Current or previous malignancy. A history of malignancy that has fully resolved with surgical resection only (e.g. no chemotherapy, radiation therapy, or immunotherapy) will be allowed.
- Current systemic immunologic disorders (e.g. Type 1 diabetes, rheumatoid arthritis). Local immunological disorder (e.g. atopic dermatitis, stable autoimmune thyroid disease) and allergic disorders will be allowed.
- Current or previous long-term immune suppressive therapy. Systemic steroid use, even short-term, must not have been used within the month prior to enrollment.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
To determine where remnants of SARS-CoV-2 virus can be recovered in persons with neuro-PASC and RVs.
Time frame: Study End
This is an exploratory study to determine where SARS-CoV-2 viral remnants can be recovered in tissues of patients with Neuro-PASC.
3 secondary outcomes
1.To characterize the biochemical nature of SARS-CoV-2 recovered viral remnants (e.g. proteins, nucleic acids).PASC and RV participants.
Time frame: Study End
2.To determine if there are quantitative differences in recovered SARS-CoV-2 proteins between neuro-PASC and RV participants.
Time frame: Study End
3.To determine if there are quantitative differences in recovered SARS-CoV-2 nucleic acids between neuro-PASC and RV participants.
Time frame: Study End
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 16 Sep 2026.
- NIH Clinical Center Detailed Web PageLink provided by the sponsor.
- Individual participant dataSharing planned: Yes. All collected IPD will be shared that underlie results in a publication.
Related trials for PASC Post Acute Sequelae of COVID-19
Not yet recruitingPhase 1
Phase I Open-Label Safety Trial of Pembrolizumab for Neurological Post- Acute Sequelae of SARS-CoV-2 (PD1-PASC I)
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Enrolling by invitationPhase 2
Immunotherapy for Neurological Post-Acute Sequelae of SARS-CoV-2
Systemic Inflammation, Neuroinflammation
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Long COVID Brain Fog: Cognitive Rehabilitation Trial
Long COVID, Brain Fog
Active, not recruitingObservational study
Pain in Long COVID-19: The Role of Sleep
Long COVID
Active, not recruiting
Home-based Brain Stimulation Treatment for Post-acute Sequelae of COVID-19 (PASC)
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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.
Avindra Nath, M.D. principal investigator
National Institute of Neurological Disorders and Stroke (NINDS)
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of PASC Post Acute Sequelae of COVID-19, run by National Institute of Neurological Disorders and Stroke (NINDS) at 1 site in United States.
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 40 inclusion and 12 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: looking for participants now, as of the sponsor's last update on 16 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. 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.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Cynthia L Vierria ((301) 594-6760, cynthia.vierria@nih.gov), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
To determine where remnants of SARS-CoV-2 virus can be recovered in persons with neuro-PASC and RVs. (time frame: Study End). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
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 16 Sep 2026.