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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Persistence and baseline determinants of seropositivity and reinfection rates in health care workers up to 12.5 months after COVID-19
BMC Medicine, Volume 19, No. 1, Article 155, Year 2021
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Description
We assessed the duration and baseline determinants of antibody responses to SARS-CoV-2 spike antigens and the occurrence of reinfections in a prospective cohort of 173 Spanish primary health care worker patients followed initially for 9 months and subsequently up to 12.5 months after COVID-19 symptoms onset. Seropositivity to SARS-CoV-2 spike and receptor-binding domain antigens up to 149–270 days was 92.49% (90.17% IgG, 76.3% IgA, 60.69% IgM). In a subset of 64 health care workers who had not yet been vaccinated by April 2021, seropositivity was 96.88% (95.31% IgG, 82.81% IgA) up to 322–379 days post symptoms onset. Four suspected reinfections were detected by passive case detection, two among seronegative individuals (5 and 7 months after the first episode), and one low antibody responder. Antibody levels significantly correlated with fever, hospitalization, anosmia/hypogeusia, allergies, smoking, and occupation. Stable sustainment of IgG responses raises hope for long-lasting COVID-19 vaccine immunity. © 2021, The Author(s).
Authors & Co-Authors
Dobaño, Carlota
Spain, Barcelona
Instituto de Salud Global de Barcelona
Ramírez-Morros, Anna M.
Spain, Sant Fruitos de Bages
Fundació Institut Universitari Per a la Recerca a L'atenció Primària de Salut Jordi Gol I Gurina
Alonso, Selena
Spain, Barcelona
Instituto de Salud Global de Barcelona
Vidal-Alaball, Josep
Spain, Sant Fruitos de Bages
Fundació Institut Universitari Per a la Recerca a L'atenció Primària de Salut Jordi Gol I Gurina
Spain, Barcelona
Institut Catala de la Salut
Ruiz-Olalla, Gemma
Spain, Barcelona
Instituto de Salud Global de Barcelona
Vidal, Marta
Spain, Barcelona
Instituto de Salud Global de Barcelona
Rubio, Rocío
Spain, Barcelona
Instituto de Salud Global de Barcelona
Parras, Daniel
Spain, Barcelona
Institut D'investigacions Biomèdiques August pi I Sunyer - Idibaps
Rodrigo Melero, Natalia
Spain, Barcelona
Barcelona Institute of Science and Technology Bist
Serra, Pau
Spain, Barcelona
Institut D'investigacions Biomèdiques August pi I Sunyer - Idibaps
Carolis, Carlo
Spain, Barcelona
Barcelona Institute of Science and Technology Bist
Santamaría, Pere
Spain, Barcelona
Institut D'investigacions Biomèdiques August pi I Sunyer - Idibaps
Canada, Calgary
Snyder Institute for Chronic Diseases
Mendioroz, Jacobo J.Aristu
Spain, Barcelona
Institut Catala de la Salut
Spain, Barcelona
Generalitat de Catalunya
Aguilar, Ruth
Spain, Barcelona
Instituto de Salud Global de Barcelona
Moncunill, Gemma
Spain, Barcelona
Instituto de Salud Global de Barcelona
Ruiz Comellas, Anna
Spain, Sant Fruitos de Bages
Fundació Institut Universitari Per a la Recerca a L'atenció Primària de Salut Jordi Gol I Gurina
Spain, Barcelona
Institut Catala de la Salut
Statistics
Citations: 30
Authors: 16
Affiliations: 7
Identifiers
Doi:
10.1186/s12916-021-02032-2
ISSN:
17417015
Research Areas
Covid
Health System And Policy
Study Design
Cohort Study