Clinical trials: Reinfection
Primary Immune Deficiency Diseases
Evaluate Bacteriophage as a Useful Immunogen in Patients With Primary Immune Deficiency Diseases (PIDD)
This protocol is designed to ascertain whether the bacteriophage 0X174 neoantigen is safe and effective as an antigen used in the evaluation of primary and secondary immune responses.
- Trial name
- Bacteriophage (NCT01617122)
- Testing
- Bacteriophage OX174
- Where
- United States
- Volunteers
- 200 people, healthy volunteers welcome
- Sponsor
- University of South Florida
Intestinal Parasitic Infections, Malnutrition
Effects of Vitamin A Supplementation on Intestinal Parasitic Reinfections
Intestinal parasitic infections, malnutrition and iron deficiency anaemia (IDA) are still considered as public health problems in rural Malaysia especially among Orang Asli children.
- Conditions
- Intestinal Parasitic Infections, Malnutrition, Anemia
- Trial name
- NCT00936091
- Testing
- vitamin A supplements
- Where
- Malaysia
- Volunteers
- 250 people, healthy volunteers welcome
- Sponsor
- Sana'a University
Knee Infection
Impact of the Type of Stabilization in the Two-stage Knee Reimplantation on Reinfection - Prospective, Randomized Study.
Participants after first-stage of knee infection reimplantation will be assign to one of two groups: with stem vs. with sleeve. Investigators will check participants on clinical, laboratory and reinfection signs.
- Trial name
- NCT04446676
- Testing
- stabilization with stem, stabilization with sleeve
- Where
- Poland
- Volunteers
- 200 people, healthy volunteers welcome
- Sponsor
- Prof A Gruca Teaching Hospital
COVID-19 Testing
COVID-19 Antibody and Reinfection Study
The goal of this study is to establish a cohort of Kaiser Permanente Colorado (KPCO) members who have and have not had COVID-19 infection for serial antibody testing and PCR testing to: 1.
- Trial name
- NCT05365750
- Where
- United States
- Volunteers
- 4,235 people, healthy volunteers welcome
- Sponsor
- Kaiser Permanente
Smokers, Elderly, Asthma, COPD, Recurrent Infections
Pneumococcal Post-Vaccination Titers
The study is looking at the pneumonia vaccine and the immune system response to this vaccine. The information gathered from this study may be important for your doctor to take care of patients with smoking histories, immune…
- Trial name
- NCT02726347
- Testing
- PPV-23
- Where
- United States
- Volunteers
- 140 people, healthy volunteers welcome
- Sponsor
- National Jewish Health
Hepatitis C, Chronic
Direct-acting Antiviral Therapy and Reinfection Among People With Chronic Hepatitis C Virus Infection and Recent Injecting Drug Use in the Prison Setting
SHARP-P is an observational cohort study investigating the effect of direct-acting antiviral (DAA) therapy and reinfection in people with chronic hepatitis C virus (HCV) and recent injecting drug use.
- Trial name
- SHARP-P (NCT03740906)
- Where
- Australia
- Volunteers
- 202 people, healthy volunteers welcome
- Sponsor
- Kirby Institute
Hepatitis C, Chronic
Direct-acting Antiviral Therapy and Reinfection Among PWID With Chronic HCV in Community-based Settings
SHARP-C is an observational cohort study investigating the effect of direct-acting antiviral (DAA) therapy and reinfection in people with chronic hepatitis C virus (HCV) and recent injecting drug use.
- Trial name
- SHARP-C (NCT03343925)
- Where
- 4 sites in Australia
- Volunteers
- 140 people, healthy volunteers welcome
- Sponsor
- Kirby Institute
Plasmodium Vivax Infection, Plasmodium Vivax Clinical Episode
Effect of Liver and Blood-stage Treatment on Subsequent Plasmodium Reinfection and Morbidity
This study specifically seeks to quantify the contribution of relapes to the burden of P. vivax infections and disease by determining on the effect of radical pre-erythrocytic and erythrocytic clearance on subsequent rates of…
- Conditions
- Plasmodium Vivax Infection, Plasmodium Vivax Clinical Episode, Plasmodium Falciparum Infection, Plasmodium Falciparum Clinical Episode
- Trial name
- NCT02143934
- Testing
- Primaquine, Chloroquine, Artemether Lumefantrine
- Where
- Papua New Guinea
- Volunteers
- 524 people, healthy volunteers welcome
- Sponsor
- Papua New Guinea Institute of Medical Research
Sars-CoV-2 Infection, MIS-C
COVID-19 and Multisystem Inflammatory Syndrome in Children (MIS-C) Risk / World Health Organization (WHO)
This study is a multicenter, international, non interventional, retrospective study about SARS-CoV-2 and Multisystem Inflammatory Syndrome (MIS-C) reinfection risk in children.
- Trial name
- REPI (NCT06255860)
- Where
- France
- Volunteers
- 204 people, healthy volunteers welcome
- Sponsor
- Association Clinique Thérapeutique Infantile du val de Marne
COVID-19 Infection, Immunization; Infection
Evaluation of COVID-19 Immune Barrier and Reinfection Risk
The goal of this observational study is to evaluate the protective effect of immune barrier on secondary infection after COVID-19 (coronavirus disease 2019) vaccination or COVID-19 virus Omicron B A.
- Trial name
- COVID (NCT05774093)
- Where
- China
- Volunteers
- 300 people, healthy volunteers welcome
- Sponsor
- Sun Yat-sen University
COVID-19 Pandemic
Prospective Study on COVID -19 Reinfection on Vaccinated and Non-vaccinated Outpatients
the aim of the study is to compare the severity of symptoms in case of reinfection with COVID-19. the study will compare between two groups; vaccinated and non vaccinated.
- Trial name
- NCT06544369
- Testing
- COVID-19 vaccin
- Where
- Egypt
- Volunteers
- 200 people, healthy volunteers welcome
- Sponsor
- Soad Ali
COVID-19
Severe Acute Respiratory Syndrome Coronavirus 2 Re-Infection Risk and Vaccine Efficacy in Austria
The coronavirus disease 2019 (COVID-19) pandemic was caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) virus.
- Trial name
- SARIVA (NCT06162533)
- Testing
- Vaccination against SARS-CoV-2
- Where
- 3 sites in Austria
- Volunteers
- 9,090,868 people, healthy volunteers welcome
- Sponsor
- Medical University of Graz
Long COVID, COVID-19 Pandemic
Long COVID and Its Associations With Health Outcomes in Older Adults
The Peking University Health Cohort in Anning, Yunnan (PKUHC-AN) is a prospective cohort study carried out in Anning, Yunnan. The primary aim of this study is to investigate the impact of COVID-19 on older adults' health, and to…
- Conditions
- Long COVID, COVID-19 Pandemic, Elderly Infection, Vaccine Reaction
- Trial name
- NCT05825651
- Testing
- no interventions
- Where
- China
- Volunteers
- 11,527 people, healthy volunteers welcome
- Sponsor
- Peking University
Primary Immune Deficiencies, Autoimmune Diseases
Investigation of Immune Disorders and Deficiencies
The immune system is an intricate system comprised of specialized cells, proteins, tissues and organs. Proper functioning is critical to the body's ability to defend itself against harmful pathogens.
- Conditions
- Primary Immune Deficiencies, Autoimmune Diseases, Inflammatory Diseases, Common Variable Immune Deficiencies
- Trial name
- NCT01981785
- Where
- United States
- Volunteers
- 343 people, healthy volunteers welcome
- Sponsor
- O & O Alpan LLC
Dengue
Homologous Re-infection With Dengue 1 or Dengue 3
Previous studies with one dengue infection in a controlled environment at Upstate generated data that has been important in understanding the clinical signs and symptoms and how a person's body reacts to dengue infection over…
- Trial name
- NCT05967455
- Testing
- Dengue virus 1 Live Virus Human Challenge (DENV-1-LVHC), Dengue virus 3 Live Virus Human Challenge (DENV-3-LVHC)
- Where
- United States
- Volunteers
- 9 people, healthy volunteers welcome
- Sponsor
- State University of New York - Upstate Medical University
SARS Coronavirus (SARS-CoV-2) Infection
A Systems Approach to Predict the Outcome of SARS-CoV-2 in the Population of a City; COVID-19
This study is to gain critical knowledge to understand the factors influencing the outcome of a pandemic virus within the city of Basel.
- Trial name
- NCT04351503
- Testing
- Study A, Study B, Study C
- Where
- 6 sites in Switzerland
- Volunteers
- 126,586 people, healthy volunteers welcome
- Sponsor
- University Hospital, Basel, Switzerland
Helminthiasis, Ascaris Infection
Soil-transmitted Helminth Reinfection Rates After Single and Repeated School Hygiene Education
Soil-transmitted helminth (STH) infections caused by Ascaris lumbricoides, Trichuris trichiura, or hookworm, affect approximately 1.5 millions individuals primarily in tropical and subtropical regions.
- Conditions
- Helminthiasis, Ascaris Infection, Trichuris Infection, Hookworm Infections
- Trial name
- NCT04227834
- Testing
- Health hygiene education
- Where
- Indonesia
- Volunteers
- 432 people, healthy volunteers welcome
- Sponsor
- Universitas Sumatera Utara
Tuberculosis
Tuberculosis Recurrence Upon Treatment With Highly Active Antiretroviral Therapy
This is a cohort observational study investigating the rate of tuberculosis (TB) recurrence in adult patients who have completed TB therapy for Pulmonary TB (PTB) and are on highly active antiretroviral therapy (HAART).The…
- Trial name
- TRuTH (NCT01539005)
- Where
- South Africa
- Volunteers
- 402 people, healthy volunteers welcome
- Sponsor
- Centre for the AIDS Programme of Research in South Africa
SARS-COV-2
Level of Immunity, Neutralization of the COVID-19 Virus and Reinfections in Residents of 2 Migrant Workers' Residences
A previous seroprevalence survey showed very high seroprevalence levels among residents of the two among the residents of the two migrant workers' hostels surveyed, indicating a high level of circulation of the virus SARS-COV-2…
- Trial name
- NCT04932837
- Testing
- Blood and Saliva collection
- Where
- 2 sites in France
- Volunteers
- healthy volunteers welcome
- Sponsor
- Epicentre
Cmv Congenital, CMV Viremia
Cytomegalovirus (CMV) Vaccines: Reinfection and Antigenic Variation
The objectives of the protocol are to determine if a structured cognitive-behavioral interventional counseling of pregnant women can limit acquisition of human cytomegalovirus (HCMV) during pregnancy that we believe, will in turn…
- Trial name
- CMV (NCT03443791)
- Testing
- Women Enrolled, Newborns of Female Study Participants
- Where
- Brazil
- Volunteers
- 121 people, healthy volunteers welcome
- Sponsor
- University of Alabama at Birmingham