Whether people gain COVID-19 immunity from vaccines or from prior infections, immunity wanes over time. The potential long-term risks of COVID-19 reinfections aren’t yet fully known.
"People should be thinking that they’re better off not getting infected than just getting infected and ignoring it," Ray said. "We’re seeing signs that it carries a cost."Whether people gain COVID-19 immunity from vaccines or from prior infections, immunity wanes over time."You are still protected against the most severe outcomes of a SARS-CoV-2 infection and the more severe disease that goes alongside that," she said.
It is difficult to compare the longevity of vaccine-induced COVID-19 immunity with immunity from prior infections, Pitzer said. Doing so would require controlling for all the factors that contribute to someone getting infected. And vaccinated people might be more likely to take additional precautions that further reduce their infection risk, she suggested.
"If you have any symptoms that are consistent with COVID-19 infection — even if it’s just a sore throat or a little bit of congestion — get tested," Pitzer said. "If you test positive, make sure you isolate and are not spreading it to other people, particularly those who might be vulnerable to a more severe outcome.
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