Pfizer Vaccine Less Effective Against Delta Infections but Prevents Severe Illness, Israeli Data Show – The Wall Street Journal

TEL AVIV– Data from Israel suggests Pfizer Inc.s vaccine is less reliable at protecting versus infections caused by the Delta variant of Covid-19 however retains its potency to prevent serious health problem from the extremely contagious strain.
The vaccine secured 64% of inoculated individuals from infection throughout an outbreak of the Delta variant, down from 94% before, according to Israels Health Ministry. It was 94% effective at preventing extreme health problem in the exact same duration, compared to 97% prior to, the ministry stated.
An Israeli official stated Tuesday the health ministry findings launched a day previously were preliminary and based on data collected from June 6 through early July. The ministry didnt launch its methodology or the data on which its findings were based.
A spokesperson for Pfizer said he couldnt discuss an unpublished survey, but pointed to a recent research study that showed the vaccine continued to offer security against brand-new variations.
The findings came as brand-new cases of Covid-19 in Israel increased to a seven-day average of 300 on Tuesday from around 10 a day for most of last month. To prevent another rise in infections, the federal government late last month reimposed an indoor mask requirement and other measures after discovering that about 90% of the new infections were most likely triggered by the Delta variation. Israels overall population is around 9.3 million.

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