The Pfizer vaccine is less effective against the spread of the Delta variant, the Israeli study finds


The BioNTech / Pfizer vaccination is less effective at slowing the spread of the Delta variant than previous strains of coronavirus, a study published by Israel’s health minister revealed.

Data collected in the last month suggests that vaccination is 64 percent effective in stopping infections among those who are completely inoculated, the minister found. The effectiveness against previous strains of the virus was estimated at 94 percent.

However, the figures, reported for the first time on the Ynet news portal, indicate that the vaccine is 93 percent effective against serious diseases and hospitalization.

Cases have surfaced since Israel lifted all remaining Covid-19 restrictions on June 1, with several experts blaming the highly transmissible Delta variant.

As of Monday the country had nearly 2,600 active cases, more than double that of the previous week, although the ministry said only 35 were considered seriously ill.


Earlier this year British health authorities also documented one decrease in effectiveness for the Pfizer jab versus the Delta variant, although less severe. Public Health England in May found that vaccination provided 88 per cent protection against symptomatic infections with Delta, and 93 per cent against the Alpha variant previously identified in Kent. According to that study the protection afforded by two doses of the Oxford / AstraZeneca vaccine was lower at 66 percent for the Delta variant.

Israel has enjoyed one of the fastest inoculation units in the world, emerging from the blockade in the spring. More than 5m of Israel’s 9m citizens have been vaccinated in all.

Rising house rates have alarmed Naftali Bennett’s government. The government last month replaced the face mask requirements for internal meetings and public transportation and is considering additional restrictions, including the reintroduction of the “green passport” scheme for those who have been vaccinated, limits for large public meetings and “booster” shots. “.

The push to inoculate teenagers, including the prime minister’s daughter, began last week and more than 100,000 have been hit.

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