For fully vaccinated people, the risk of infection with Covid-19 - described as "infection progression" - remains extremely low, a new study in New York suggests.
Among the 417 employees at Rockefeller University who were vaccinated with the Pfizer or Moderna vaccine, only two of them became infected again later, according to the study published Wednesday in the New England Journal of Medicine.
Researchers from Rockefeller University found that coronavirus variants with some changes from the original virus caused infections. One variant that infected one of the patients had the E484K mutation, which was first found in variant B.1.351 initially identified in South Africa. E484K may be able to get rid of some of the antibodies produced by coronavirus vaccines.
Experts say some cases of re-infection with Covid-19 are expected in people who have been fully vaccinated, as no vaccine is 100% effective.
Last week, the U.S. Centers for Disease Control and Prevention (CDC) told CNN that the agency has so far received less than 6,000 re-infection reports among 84 million people fully vaccinated across the country.
The CDC said these cases occurred in people of all ages, but just over 40% were in people 60 or older.
"Post-vaccine infections make up a small percentage of people who are fully vaccinated. "The CDC recommends that all people get a vaccine for Covid as soon as it is available," the CDC said in a statement to CNN.
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Burimet: CNN, New England Journal of Medicine, Healthline
