“…Rates of reinfection can be considerable, with one Kenyan study finding that, within 6 months of a primary infection, reinfection among study participants occurred at rates of 21%, 5.7%, and 4.0% for NL63, OC43, and 229E, respectively (Kiyuka et al, 2018). Specific IgG and neutralizing antibodies have been detected in recovered COVID-19 patients for at least 5-8 months after infection, suggesting a prolonged humoral immune response and the potential for protection against reinfection and disease (Wajnberg et al, 2020;Borgonovo et al, 2021;Fotouhi et al, 2021;Chvatal-Medina et al, 2021;Gudbjartsson et al, 2020;Dan et al, 2021;Lumley et al, 2021). However, some studies have suggested that the intensity and longevity of the SARS-CoV-2 humoral responses correlate with disease severity, with IgG and neutralizing antibody titers declining more rapidly (within 1-4 months) (Ibarrondo et al, 2020;Lau et al, 2021;Long et al, 2020;Roltgen et al, 2020;Self et al, 2020).…”