In one of the studies cited by the CDC, the Pfizer-BioNTech vaccine was shown to be 97 percent effective at protecting against symptomatic infection and 86 percent effective at protecting against asymptomatic infection. Those results, published May 6 in the Journal of the American Medical Association, were based on a study of more than 6,700 vaccinated health care workers in Israel.
Walensky also referenced two recent U.S.-based studies that were published in the CDC's Morbidity and Mortality Weekly Report. One study demonstrated that Covid-19 vaccines were 90 percent effective at preventing both symptomatic and asymptomatic infection among nearly 4,000 health care workers and front-line workers. A second study found the Pfizer and Moderna vaccines were 94 percent effective at preventing Covid-19-related-hospitalizations among adults 65 and older who have been fully vaccinated.
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My avatar is a sketch by my son who is an art school graduate. Some of his sketches and paintings are at
https://www.jamesspaethartwork.com/
He is available to do custom drawings in graphite, charcoal and other media. He also sells some of his works as note cards/greeting cards on Etsy under JamesSpaethArt.
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