The study confirms that a fourth dose of the vaccine may not be sufficient to prevent Ómicron

The Israeli study concludes that the second booster dose of the vaccine does not prevent infections of the Ómicron variant, although it does strengthen antibodies.

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The fourth dose of the Covit-19 vaccine raises antibodies to a higher dose than the third dose, but this may not be sufficient to prevent infection. Omigron, According to an initial study conducted in Israel.

Vaccines can lead to an increase in the number of antibodies “slightly higher than we had then Third dose“, Doctor Gili Regev-Yochay told Reuters, these results are preliminary and have not been published.

The study was conducted at Sheba Medical Center on December 27, four months after the first booster dose, with 150 healthy staff receiving the fourth dose of the Pfizer vaccine.

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“Two weeks after vaccination, we see an increase in antibodies after the third dose,” Dr. Jerusalem told the Post. “However, many people have been affected by the fourth dose of Omigran. Although slightly lower than the control group, there are still a lot of infections.

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Sheba researchers are conducting a study similar to giving a fourth dose of Moderna to another group of 150 healthy hospital staff. According to Regev Yochay, in this case, one week after the new booster, the level of antibodies increases, which is similar to that reported after the Pfizer vaccine.

The doctor says it is still too late to understand the effect of the fourth dose on the prevention of acute disease associated with the corona virus.

“These are very early decisions, before any publication, but we decided to share them because we understood the public’s urgency to get the information,” he said.

I think the decision to give the fourth dose of the vaccine to people who are vulnerable is the right one., Says the doctor. “It may offer some benefits, but they are not enough to support the idea of ​​managing the whole population.”

Israel was the first country to provide a fourth dose or second booster of the vaccine to the most vulnerable and high-risk groups.

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One week after administration of the fourth drug, a Five-fold increase The number of antibodies in the vaccinated person, doctors say. “The vaccinated person will receive the highest level of protection against infection and contagion and acute illness, with the fourth vaccine,” the Israeli prime minister explained. Naphtali Bennett, Should conclude that “the vaccine is more likely to work”.

Within two weeks, more than 550,000 people over the age of 60 had already received a fourth dose.

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