Persistence of IgG response to SARS-CoV-2
This article reports on the persistence of Covid-19 antibodies in 81 healthcare workers. Seven (9%) had undetectable antibodies after 107-159 days. For those remaining seropositive, median duration of antibody persistence was 168.5 (range 62-199) days at last follow-up.
Source:
The Lancet Infectious Diseases
SPS commentary:
The authors note that a rapid decline in SARS-CoV-2 IgG seropositivity was not observed, and that this is in accordance with earlier observations of antibody persistence after infection with severe acute respiratory syndrome coronavirus or Middle East respiratory syndrome coronavirus. The importance of neutralising antibodies in long-term immunity against SARS-CoV-2 however remains to be determined,