Israeli study finds fourth COVID-19 vaccine dose boosts antibodies five-fold, PM says

Bennett says preliminary data from Sheba Medical Center's survey shows second booster is safe and will likely mean significant protection against infection, hospitalizations and severe symptoms

A fourth dose of COVID-19 vaccine boosts antibodies five-fold a week after the shot is administered, Prime Minister Naftali Bennett said on Tuesday, citing preliminary findings of an Israeli study.
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  • "A week into the fourth dose we know to a higher degree of certainty that the fourth dose is safe," Bennett said at Sheba Medical Center, which is giving second booster shots in a trial among its staff amid a nationwide surge in Omicron variant infections.
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    בני ובנות 60+ מקבלים חיסון קורונה רביעי באשקלון
    בני ובנות 60+ מקבלים חיסון קורונה רביעי באשקלון
    A man receives his fourth coronavirus vaccine at a clinic in Ashdod
    (Photo: Barel Ephraim)
    "The second piece of news: We know that a week after administration of a fourth dose, we see a five-fold increase in the number of antibodies in the vaccinated person," he told reporters.
    "This most likely means a significant increase against infection and ... hospitalization and (severe) symptoms," Bennett said in English.
    Israel has played a leading role in studying the effects of COVID-19 vaccines, as the fastest country to roll out two-dose inoculations to a wide population a year ago and one of the first to give third shots as boosters. It is now administering fourth doses of the Pfizer/BioNTech vaccine to people over 60, health workers and immunocompromised patients.
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     נחמן אש
     נחמן אש
    Health Ministry Director-General Prof. Nachman Ash receives his second booster shot
    (Photo: Ranaan Ben-Zur)
    Earlier on Tuesday, Health Ministry Director-General Prof. Nachman Ash received his fourth vaccine shot.
    "It is very exciting for me to be here and get the fourth shot, the second booster," he said. "This is a very, very contagious variant, as we see. Morbidity rises and surges every day. The best answer is the vaccine."
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