The presence of serum anti-SARS-CoV-2 IgA appears toprotect primary health care workers from COVID-19
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Antibodies to the SARS-CoV-2 receptor-binding domain that maximize breadth and resistance to viral escape
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Prior COVID-19 protects against reinfection, even in the absence of detectable antibodies
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Long-Term Persistence of IgG Antibodies in recovered COVID-19 individuals at 18 months and the impact of two-dose BNT162b2 (Pfizer-BioNTech) mRNA vaccination on the antibody response
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