Independently, we found no re-infection among those
with prior COVID-19, contributing to 74,557 re-infection-free person-days, adding to
the evidence base for the robustness of naturally acquired immunity.
Independently, we found no re-infection among those
with prior COVID-19, contributing to 74,557 re-infection-free person-days, adding to
the evidence base for the robustness of naturally acquired immunity.