Scientists Warn Too Many Shots Harm Body’s Ability to Fight Coronavirus Plague

JERUSALEM — Israel is considering whether to approve a fourth Covid-19 vaccine dose for vulnerable people to contain the fast-spreading Omicron variant, despite debate among scientists and a lack of evidence either for or against another booster.

The panel of experts advising the Israeli government on the pandemic recognized that uncertainty, but on Tuesday it recommended giving a fourth dose, concluding that the potential benefits outweighed the risks. It pointed to signs of waning immunity a few months after the third shot, and said that any delay in additional doses might prove too late to protect those most at risk.

But some scientists warned that the plan could backfire, because too many shots might cause a sort of immune system fatigue, compromising the body’s ability to fight the coronavirus. A few members of the government’s advisory panel raised that concern with respect to the elderly, according to a written summary of the discussion obtained by The New York Times.

Prime Minister Naftali Bennett, has made clear he supports a fourth shot, and Health Minister Nitzan Horowitz has suggested that a new round of boosters could get underway by Sunday. But by Thursday evening, the health ministry had not acted on the advice, and a senior ministry official said it was waiting for more data from other countries.

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Source: Dnyuz