Robust humoral and cellular immune responses and low risk for reinfection at least 8 months following asymptomatic to mild COVID-19.
Sebastian HavervallHenry NgAugust Jernbom FalkNina Greilert-NorinAnna MånbergUlrika MarkingIda LaurénLena GabrielssonAnn-Christin SalomonssonKatherina AguileraMartha KihlgrenMaja MånssonAxel RosellCecilia HellströmEni AnderssonJennie OlofssonLovisa SkoglundJamil YousefElisa PinMartin LordMikael ÅbergMy HedhammarHanna TegelPierre DönnesMia PhillipsonPeter NilssonJonas KlingströmSara M MangsboSophia HoberCharlotte ThålinPublished in: Journal of internal medicine (2021)
The vast majority of anti-spike IgG positive individuals remain anti-spike IgG positive for at least 8 months regardless of initial COVID-19 disease severity. The presence of anti-spike IgG antibodies is associated with a substantially reduced risk of reinfection up to 9 months following asymptomatic to mild COVID-19.