ASSOCIATED PRESSKey FactsIn a lab, researchers exposed cells with antibodies from the Pfizer vaccine to the original strain of Covid-19 and four variants. That’s why people who have been vaccinated have been shown to have such strong protection against the delta variant despite its rapid spread among the unvaccinated. With 49% of U.S. residents still not fully vaccinated, however, the delta variant has more chances to break through and infect people who have received their shots. ContraDifferent vaccine studies have found a range of effectiveness against the delta variant: from nearly 90%, in a Pfizer study, to 64% in an Israeli study. That’s how many Covid-19 cases in Alaska were in fully vaccinated people, according to data from 25 states analyzed by the Kaiser Family Foundation.

Source: Forbes August 17, 2021 21:11 UTC