Israel reported a decrease in the effectiveness of the Pfizer vaccine in preventing infections and symptomatic illness but said it remained highly effective in preventing serious illness.
The decline coincided with the Delta variant spread and the end of social distancing restrictions in Israel.
Vaccine effectiveness in preventing both infection and symptomatic disease fell to 64 percent since June 6, the Health Ministry said, and was 93 percent effective in preventing hospitalizations and serious illness from COVID-19.
The ministry did not say what the previous level was or provide any further details, but it published a report in May that two doses of Pfizer’s vaccine provided over 95 percent protection against infection, hospitalization and severe illness.
About 60 percent of Israel’s 9.3 million population received at least one shot of Pfizer’s vaccine in a campaign that saw daily cases drop from over 10,000 in January to single digits in June.