COVID Infection Provides Immunity Equal to Vaccination: Study
Feb. 17, 2023 — The natural immunity provided by a COVID infection protects a person against severe illness on a par with two doses of mRNA vaccine, a new study says.
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But protection against the BA.1 subvariant of Omicron was not as high – 36% at 10 months after infection, says the research team from the Institute for Health Metrics and Evaluation at the University of Washington.
The researchers examined 65 studies from 19 countries through Sept. 31, 2022. They did not study data about infection from Omicron XBB and its sub-lineages. People who had immunity from both infection and vaccination, known as hybrid immunity, were not studied.
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