Boosted vaccine reduces the risk of serious illness by 20 times due to Covid-19

New research in Israel shows that a third dose of vaccine reduces the risk of serious illness after nCoV infection by up to 20 times compared to people who have not been vaccinated.

The study, published in the New England Journal of Medicine on September 15, showed an 11-fold reduction in the risk of nCoV infection and a 20-fold reduction in the risk of severe illness among those who received a triple booster dose of Pfizer compared with those who did not.

The results come after researchers analyzed data on 1.1 million Israelis over 60 years old, who received two full doses of the vaccine five months ago, and then received a booster dose or not.

Earlier Israeli media also published preliminary results of a serological study carried out on medical staff at Sheba Hospital in Ramat Gan, on the outskirts of Tel Aviv, showing their antibody levels after when injecting booster shot is 10 times higher than when injecting second dose.

People at a Covid-19 vaccination site in Herzliya, Israel, in February. Photo: Reuters.

People at the Covid-19 vaccination site in Herzliya, Israel, in February. Photo: Reuters.

Israel launched a booster injection campaign last month, after fears the Covid-19 vaccine would lose its effectiveness after five months.

The number of severe cases in Israel spiked from more than 70 at the end of July to 600 in mid-August, currently stabilizing at less than 700. The number of infections among people receiving the third dose is also very low. “It shows that weakened immunity is the cause of the fourth wave and the booster dose has worked,” said Gabi Barbash, former director general of Israel’s Ministry of Health.

Prime Minister Naftali Bennett this week also affirmed that the Covid-19 response strategy, which focuses on injecting booster doses for all people 12 years of age and older, is an effective approach. “A lot of people were skeptical, but our strategy has proven effective,” he said.

Since taking office in June, Prime Minister Bennett has vowed to avoid the risk of a re-lockdown of the country, a pledge he has kept even as the country of about 9.3 million people regularly records more than 10,000 infections a year. day.

Israel has reported more than 1.2 million infections and more than 7,400 deaths from Covid-19 since the outbreak. Nearly 70% of Israel’s population has received at least one dose of the vaccine, of which more than 63% have had the full dose.

Thanh Tam (Follow AFP)


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