CDC: Unvaccinated people more than twice as likely to get reinfected

• Immunity from natural infection is suspected to last roughly 90 days, the CDC said.
• The agency added that the emergence of new variants might affect how long this immunity lasts.

Details: The study involved 246 Kentucky residents who were reinfected between May and June.

• Of note: At the time the study was taken, the Delta variant was not yet the dominant strain in the U.S.

What they're saying: The study's results "suggest that among persons with previous SARS-CoV-2 infection, full vaccination provides additional protection against reinfection. To reduce their risk of infection, all eligible persons should be offered vaccination, even if they have been previously infected with SARS-CoV-2," the CDC said.