"TEL AVIV -- Data from Israel suggest Pfizer Inc.'s vaccine is less effective at protecting against infections caused by the Delta variant of Covid-19 but retains its potency to prevent severe illness from the highly contagious strain.
The vaccine protected 64% of inoculated people from infection during an outbreak of the Delta variant, down from 94% before, according to Israel's Health Ministry. It was 94% effective at preventing severe illness in the same period, compared with 97% before, the ministry said.
Late on Tuesday, the health ministry released a brief explanation of its methodology and the data on which its findings were based. During the period that coincided with the Delta outbreak, 1,271 of 1,528 total new infections were fully vaccinated individuals, as were 23 of 37 hospitalizations and 11 of 17 cases of severe illness, the ministry said.
A spokesman for Pfizer said he couldn't comment on an unpublished survey, but pointed to a recent study that showed the vaccine continued to offer protection against new variants." [1]
1. U.S. News: Delta, Pfizer Shot Studied in Israel
Lieber, Dov. Wall Street Journal, Eastern edition; New York, N.Y. [New York, N.Y]07 July 2021: A.3.
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