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Israeli study shows 4th shot of COVID-19 vaccine less effective on Omicron

Stock Markets Jan 17, 2022 11:40AM ET

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Israeli study shows 4th shot of COVID-19 vaccine less effective on Omicron

© Reuters. 93-year-old Shari Marco receives a fourth dose of the coronavirus disease (COVID-19) vaccine following a vaccination party after Israel approved a second booster shot for the immunocompromised, people over 60 years and medical staff in a retirement home i

JERUSALEM (Reuters) -A fourth shot of COVID-19 vaccine boosts antibodies to even higher levels than the third jab but it is not enough to prevent Omicron infections, according to a preliminary study in Israel.

Israel's Sheba Medical Center has given second booster shots in a trial among its staff and is studying the effect of the Pfizer (NYSE:PFE) booster in 154 people after two weeks and the Moderna (NASDAQ:MRNA) booster in 120 people after one week, said Gili Regev-Yochay, director of the Infectious Diseases Unit.

These were compared to a control group that did not receive the fourth shot. Those in the Moderna group had previously received three shots of Pfizer's vaccine, the hospital said.

The vaccines led to a increase in the number of antibodies "even a little bit higher than what we had after the third dose", said Regev-Yochay.

"Yet, this is probably not enough for the Omicron," she told reporters. "We know by now that the level of antibodies needed to protect and not to got infected from Omicron is probably too high for the vaccine, even if it's a good vaccine."

The findings, which the hospital said were the first of its kind in the world, were preliminary and not yet published.

Israel was the fastest country to roll out initial vaccinations against COVID-19 a year ago and last month started offering a fourth shot, or a second booster, to the most vulnerable and high-risk groups.

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Comments (10)

pcg upstate Jan 17, 2022 4:28PM ET

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love the thumbs down lol

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Gus McCrae Jan 17, 2022 3:22PM ET

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is the vaccine kosher? doesn't sound legit to me

2 1

Jose Cabreja Jan 17, 2022 2:28PM ET

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The 6 Shot imo will do it🤣🤣🤣

5 0

Thomas Bjerre Kristiansen Jan 17, 2022 2:22PM ET

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Try a 5. shot then, maybe that will magically make the virus go away

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Rod Quasney Jan 17, 2022 1:53PM ET

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So next year's headline will be, is the 13th of Coronavirus still even less effective than the 10th, 11th and 12th vaccines. People of this World have truly lost the ability to think in a logical fashion.

7 1

John Falcone Jan 17, 2022 1:43PM ET

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It's amazing what the creatures will believe

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Honey Badger Jan 17, 2022 12:18PM ET

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Its simple pharma fraud

7 2

Empire Destroyer Jan 17, 2022 11:56AM ET

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OMG pharma gonna modify existing vaccine a little bit and say it's effective and sell billions more 🤣🤣

10 2

Caspian Jan 17, 2022 11:49AM ET

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Fake vaccine...

13 2

chris mac Jan 17, 2022 11:41AM ET

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the logical conclusion - a 5th shot will solve all our problems!

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