The Israeli Sheba Hospital announced that preliminary research indicates that the fourth dose of the Corona vaccine provides a “limited defense” against the “Omicron” mutant, which is spread around the world.
Sheba Hospital last month began giving a fourth vaccine to more than 270 medical workers (154 who received the Pfizer vaccine and 120 who received the Moderna vaccine), all of whom were previously vaccinated with three doses of the “Pfizer” vaccine.
The clinical trial found that both groups showed an increase in antibodies “a little higher” than following the third dose of the vaccine last year. But, she said, the increase in antibodies did not prevent the spread of “Omicron”.
“Despite increased antibody levels, the fourth vaccine offers only partial defense against the virus,” said Dr. Gilly Regev Yochai, director of the hospital’s infectious disease unit. “Vaccines, which were more effective against previous variants, provide less protection compared to Omicron.”
Dr. Nahman Asch, director of the Israeli Ministry of Health, said the research does not mean that the fourth vaccine effort was wrong. It restores the antibody level to what it was at the start of the third booster, noting that “this is of great importance, particularly in the older population.”
“The research will be taken into account while the authorities discuss whether to extend the additional booster-dose campaign to the entire population,” he explained.
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