How effective has the fourth COVID-19 vaccine dose been in Israel?

Embargoed until: Publicly released: 2022-04-14 07:00

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A fourth dose of a COVID-19 vaccine can reduce the risk of severe disease in the short term, according to Israeli research. The team used hospital data to examine the difference in COVID-19 outcomes between people over 60 given a fourth dose and people of a similar demographic who had three doses. The researchers say in the days 7 to 30 after a fourth dose, about 180 fewer people per 100,000 are likely to be hospitalised with the virus compared to those who had three doses. About 69 fewer people per 100,000 are likely to have severe COVID-19 after a fourth dose, they say.

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Research Massachusetts Medical Society, Web page The URL will go live after the embargo ends

Journal/
conference: New England Journal of Medicine

Research:Paper

Organisation/s: Clalit Research Institute, Israel

Funder: Funded by the Ivan and Francesca Berkowitz Family Living Laboratory Collaboration at Harvard Medical School and Clalit Research Institute.

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