Post-infection immunity was very protective against Delta, the C.D.C. reports

[Celerity]

but vaccines still offer the best defense.

https://www.nytimes.com/live/2022/01/19/world/omicron-covid-vaccine-tests#post-infection-immunity-was-very-protective-against-delta-the-cdc-reports-but-vaccines-still-offer-the-best-defense

Previous infection with the coronavirus appeared to provide stronger protection against the Delta variant than did vaccination in a large sample of patients, the Centers for Disease Control and Prevention reported on Wednesday.

But there are significant health risks to infection, and in the long term, vaccination still offers the best defense against the virus, the researchers said.

The data were gathered before the widespread rollout of booster shots and the emergence of the Omicron variant, so the findings may not be relevant to the current surge, the agency cautioned.

“These findings cannot be generalized to the current Omicron wave,” Benjamin Silk, an epidemiologist at the C.D.C., told reporters on Wednesday. “It’d be like comparing apples and oranges.”

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