Vaccines are less protective against Delta infection but still reduce risk by two-thirds, CDC study shows

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Tue, 2021-08-24 20:49 — mike kraft

Vaccines are less protective against Delta infection but still reduce risk by two-thirds, CDC study shows Vaccine effectiveness against Covid-19 infection dropped from 91% to 66% once the Delta variant accounted for the majority of circulating virus, according to a study published Tuesday by the US Centers for Disease Control and Prevention. Michael Nedelman, Eric Levenson and Madeline Holcombe, CNN CNN

(CNN) effectiveness against Covid-19 infection dropped from 91% to 66% once the Delta variant accounted for the majority of circulating virus, according to a study published Tuesday by the US Centers for Disease Control and Prevention.

"While we did see a reduction in the protection of the Covid-19 vaccine against the Delta variant, it's still two-thirds reduction of risk," lead author Ashley Fowlkes, an epidemiologist for CDC Covid-19 Emergency Response, told CNN on Tuesday.

The study is in line with others from the US and around the world showing Delta's increased tendency to cause largely minor infections among fully vaccinated people. Still, the effectiveness of vaccines against severe disease -- including hospitalization and death -- has remained high against all known variants. ...

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