Lots of people are getting reinfected as the BA.2.12.1 variant spreads. Here's what to know about COVID-19 and reinfection
that people who have had COVID-19—around 60% of the U.S. population, by the agency’s estimates—should not assume they won’t get sick again.
Both COVID-19 vaccinations and prior disease provide some protection against future illnesses, but they’re better at preventing severe disease than infection, says Dr. Rachel Presti, medical director of the Infectious Disease Clinical Research Unit at the Washington University School of Medicine in St. Louis. Reinfections are likely to be mild, she says, but they’re also probably going to keep happening.
getting infected,” Presti says. “It’s not like an external wall. It’s more like guards inside the gates.” Rosenberg says there’s always a spike in reinfections when a new variant starts to surge, since antibodies from one strain may not hold up well against the next. Experts often say reinfection is unlikely for at least 90 days following a COVID-19 illness, and maybe longer. But that’s only true if a new variant doesn’t pop up, Rosenberg says, and the virus “keeps switching on us every few months—faster than 90 days.
Research suggests the newer variants are also better at evading immune defenses than their predecessors. Omicron caused
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