New study following 12,541 healthcare workers for #COVID19 re-infection over 31 weeks published in NEJM. Natural immunisation held up well over the 6 months of the study, with only two cases of asymptomatic reinfections observed.https://t.co/nlDg79Zszt pic.twitter.com/LXMD2R3bq1

— Prof Francois Balloux (@BallouxFrancois) December 28, 2020