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Describe the immune response of patients affected by SARS-CoV-2, including an assessment of the types of antibodies elicited by the infection, specifc antibody titers for the different isotypes, evolution of the antibody response over time, protective efficacy and immune correlates of protection.
investigate genetic determinants of Covid-19 and of the imune response to this condition.
Finally, the study will investigate secondary infection rate and its determinants among household contacts of Covid-19 patients.
Full description
The main objective of the study is to describe the immune response to the SARS-CoV-2 virus among patients with confirmed Covid-19 disease in terms of antibody levels, differences in response related to epidemiologic and clinical characteristics, duration of the antibody response and protective efficacy.
Of particular interest is the demonstration of seroconversion with neutralizing antibodies, their duration during a follow-up of two years and their ability to prevent subsequent infections and disease. If antibodies are demonstrated to protect against subsequent infections and that protection is long-lasting, this can be instrumental for the reincorporation of immune individuals into normal life and economic activities.
Additional secondary objectives include determination of population-prevalence of past infection and assessment of genetic determinants of the immune response and the clinical presentation of the disease. Finally, we will investigate secondary transmission in a sample of household contacts of Covid-19 cases.
This study will provide important information to define the use of specific types of antibodies and their potential utility for diagnosis, ascertainment of previous exposure and acquired immunity. The effort is being conducted by the Caja Costarricense de Seguro Social, the Costa Rican Ministry of Health and the Agencia Costarricense de Investigaciones Biomédicas (ACIB), in collaboration with the US National Cancer Institute, the US National Institute of Allergy and Infectious Diseases and the German Cancer Research Center and will be supervised by the Ethical Committee of the CCSS according to local regulations.
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Inclusion and exclusion criteria
Inclusion Criteria:
Recruitment of cases Eligibility criteria Inclusion criteria
Potential participants will be deemed eligible if they are:
Potential participants will be excluded or deferred from enrollment if:
Enrollment of active cases Most of the cases of Covid-19 are treated at CCSS hospitals or clnics, where the it is a disease of mandatory reporting. Personnel of the Social Security or Ministry of Health will inform the potential participant case about the study and ask if they are willing to be contacted by study personnel to receive further information. The intention is to recruit all cases with the disease registered in Costa Rica.
Enrollment of recovered cases
Recovered cases are subjects previously diagnosed with Covid-19 via a positive PCR test who were considered recovered because they had two consecutive negative PCR tests. The first cases was diagnosed in March 2020. They will be contacted and recruited at home based on the registration lists of the CCSS and the Ministry of Health, their eligibility criteria and consent procedures will be similar to those of the active cases, but their specimen collection will be different Community control group selection and enrollment Inclusion criteria
Potential participants will be deemed eligible if they are:
Exclusion criteria
Potential participants will be excluded or deferred from enrollment if:
2,000 participants in 3 patient groups
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Central trial contact
Viviana Loría, Médica; Rebeca Ocampo, Médica
Data sourced from clinicaltrials.gov
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