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Israeli study shows third dose of Pfizer vaccine reduces risk of serious illness and hospitalization by more than 90%

i24NEWS

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Vaccination center of the Clalit health service in Jerusalem, October 7, 2021.
Olivier Fitoussi/Flash90Vaccination center of the Clalit health service in Jerusalem, October 7, 2021.

The results also show that the booster dose is effective in reducing Covid-related mortality by 81 percent

A booster dose of Pfizer's Covid vaccine reduces the risk of severe disease by 92 percent, an Israeli study published Friday in the medical journal Lancet found.

The research, conducted by the Israeli health service Clalit and funded by Harvard Medical School, involved 728,321 people who received a third dose of the vaccine, and a control group of a similar number who were vaccinated with a second dose at least five months earlier.

The analysis also showed that a booster dose of the Pfizer vaccine reduced the risk of hospitalization by 93 percent, with the health department recording 231 hospitalizations in the control group versus 29 patients vaccinated three times.

The results also showed that the booster dose was effective in reducing Covid-related mortality by 81 percent, with seven deaths among those vaccinated three times, compared with 44 among those who received only two injections.

“The results demonstrate in a very convincing way that the third dose of the vaccine is extremely efficient,” said Ran Balicer, Clalit’s chief innovation officer, according to Times of Israel.

Israel was the first country in the world to offer a booster shot, the end of the fourth wave being credited to its use of boosters. 

Roughly four million Israelis have received a third dose of the Covid vaccine. 

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