COVID: reinfection after a natural infection
A recent editorial reviewed several studies regarding SARS-CoV-2 reinfection after a natural infection (see covid reinfection editoral lancet 2021 in dropbox, or doi.org/10.1016/ S0140-6736(21)00662-0 ) Editorial Details, along with comments: -- we do know that many of the coronaviruses do not develop long-lasting immunity, specifically those 4 well-known to be associated with seasonal URIs -- we also know that SARS-CoV-2 antibody levels post-Covid infection can be low or undetectable, from several older studies. though antibody levels can also last for more than 6 months -- they comment on a Brazilian study of healthcare workers, indicating "a relatively high rate of reinfections correlated with the lowest antibody responses", though they do note that do-novo reinfection could not be confirmed (see covid reinfection brazil JInf2021 in dropbox, or doi.org/10.1016/j.jinf.2021.01.020 ) -- 33 people ...