The risk for reinfection appears even higher now, thanks to two immune-dodging omicron subvariants, BA.4 and BA.5. Together, the two variants are driving the majority of new cases in the U.S.
Every time a person is exposed, the immune response matures and improves.
“We do not know, but in experience from other infections, if you’re infected, there’s probably a few months’ grace period where you really have enough ongoing immunity that you’re not going to get reinfected,” he said. “For the most part, you likely will have a few months’ period of protection. But after that, we are seeing that it does wane.”“Anecdotally, you’ll hear a case of someone who got infected and then four weeks later they got infected again — that happens," Fauci said.
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