COVID vaccine booster increases virus immunity by 10 times, study shows

Study conducted by top Israeli medical research centers, which examined over a million Israelis aged 60+, also shows third jab takes full effect 12 days after administration and not 7 as was initially estimated

Adir Yanko, Dr. Itay Gal|
Pfizer's COVID-19 vaccine booster shot enhances the body's ability to fight off coronavirus by ten times, a new study reveals.
  • Follow Ynetnews on Facebook and Twitter

  • The study, which was published Thursday in “The New England Journal of Medicine,” was conducted by Israel's most prestigious medial research center, including the Weizmann Institute of Science, Technion - Israel Institute of Technology, The Hebrew University, Gartner Institute, Sheba Medical Center and KI Institute.
    3 View gallery
    מתחסנים בחיסון שלישי
    מתחסנים בחיסון שלישי
    A medical worker prepares to administer the third jab of the COVID vaccine
    (Photo: EPA)
    The Health Ministry will present the research's findings to Food and Drug Administration on Friday in a meeting regarding the effectiveness of the booster and the decision on whether to start offering the third jab to the general population in the United States.
    The study examined one million Israelis aged 60 and over who received the first two doses of the vaccine before March 2021 and the third shot at the start of August.
    3 View gallery
    מבצע חיסונים של מד"א ועיריית תל אביב בכיכר דיזנגוף
    מבצע חיסונים של מד"א ועיריית תל אביב בכיכר דיזנגוף
    An elderly man receiving the third jab of the COVID vaccine in Tel Aviv
    (Photo; Moti Kimchi)
    The study then compared the immunity levels of those who went on to receive the third jab to those who received only the two initial doses. The study did not include data on those who did not receive the vaccine at all.
    According to the research, the booster shot provides full protection approximately 12 days after administration. This is in contrast to initial studies, which assumed that it takes the booster only a week to provide full protection against the virus.
    3 View gallery
    מבצע חיסונים של מד"א ועיריית תל אביב בכיכר דיזנגוף
    מבצע חיסונים של מד"א ועיריית תל אביב בכיכר דיזנגוף
    People waiting in line in Tel Aviv to receive the booster
    (Photo: Moti Kimchi)
    The data also showed that the booster starts taking effect within the first two days after administration. The researchers believe, however, the data might have been skewed due to behavior of the inoculated.
    According to researchers' estimates, in the first few days after the third jab, most people get tested less, or otherwise take extra care not to expose themselves to others.
    The commenter agrees to the privacy policy of Ynet News and agrees not to submit comments that violate the terms of use, including incitement, libel and expressions that exceed the accepted norms of freedom of speech.