Covid – Omicron: an Israeli study on the 4th dose confirms its low efficacy against contamination

A study conducted in Israel on the fourth dose of the vaccine found that it offered insufficient protection against the Omicron variant of Covid-19.

“We see an increase in antibodies, higher than after the third dose. However, we see that many people infected with Omicron have received the fourth dose. Certainly a little less, but still a lot of infections”, acknowledged Professor Gili Regev-Yochay, co-author of this study, reports i24News, whose premises had already suggested disappointing results.

Also read: Covid – Disappointment in Israel: the 4th dose less effective than expected

One week after the start of this clinical trial, which still has to last six months, “the antibodies (of the participants, editor’s note) have increased fivefold, which indicates that the vaccine works and offers protection against serious complications”, still rejoices. .

“Not Good Enough Against Omicron”

Led by a team from Sheba Hospital in Tel Aviv, the study was conducted on a cohort of 154 caregivers who received a fourth dose (second booster) of the Pfizer vaccine and another 120 volunteers who received a fourth dose of Moderna serum.

“The main thing is that the vaccine is excellent against Alpha and Delta, but for Omicron it is not good enough,” added Professor Regev-Yochay, but he specified that these are only preliminary results for the moment.

Reserve the 4th dose for the elderly

The epidemiologist finally stressed that administering a fourth dose of the vaccine to people at risk is “probably a good idea.” However, the recommendations currently in force in Israel, the fourth injection for people over 60 years of age in particular, should probably be modified to include only the elderly.

A pioneer in vaccination campaigns against covid, Israel was the first country in the world to vaccinate children and embarked on a 4th dose campaign last December.

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