Booster vaccine can produce 10 times more antibodies

IsraelA preliminary study in Tel Aviv showed that antibody levels after a week of booster shots were 10 times higher than the second dose of Covid-19 vaccine.

Preliminary results of a serological study conducted on medical staff at Sheba Hospital in Ramat Gan, a suburb of Tel Aviv, showed that their antibody levels after the booster shot were more than twice as high. 10 times when injecting the second injection, Israeli media reported on September 14.

The study compared the antibody levels of healthcare workers one week after they received the second and booster shots, but has not yet announced which Covid-19 vaccine has been used.

Sheba Hospital said it is reviewing the results of the study with caution and will continue to monitor the antibody levels of those receiving the booster shot in the coming months.

An Israeli health worker injects a woman with a Covid-19 vaccine at a vaccination center in Jerusalem on September 9.  Photo: Flash90.

An Israeli health worker injects a woman with a Covid-19 vaccine at a vaccination center in Jerusalem on September 9. Photo: Flash90.

Israel was the first country in the world to receive a booster shot of the Covid-19 vaccine. Israel’s booster injection campaign started on August 1, initially applied to people over 60 years old.

Israel then expanded the program to include people 12 years of age and older who had received a second dose of the vaccine at least five months earlier. As of September 15, at least three million Israelis had received booster shots.

While the booster shot is underway, Salman Zarka, Israel’s leading Covid-19 expert, has called on the country to begin preparations for the fourth Covid-19 vaccine shot. “Covid -19 is and will continue to be here, so we need to prepare for a fourth vaccine,” Zarka said, but did not say when Israel might launch this program.

“With the vaccine’s effectiveness waning and antibody levels decreasing over time, it seems likely we’ll need booster shots every six months or a year,” Zarka said in August.

The Israeli Ministry of Health in early September announced that the Covid-19 green card, a certificate that allows people who have received the vaccine to be allowed to enter certain public places, will expire 6 months after they receive their second or second dose. Tuesday. This decision shows that Israel can deploy the next dose of vaccine 6 months after the booster dose.

However, 18 experts and two former officials of the US Food and Drug Administration (FDA) earlier this week stated that a third dose is not needed for the majority of people.

The report, published in the medical journal Lancet, says that even with the Delta super-infectious variant, “the booster dose is generally not appropriate at this stage of the pandemic.”

After Israel and some countries started booster shots due to fears of Delta mutations, the World Health Organization (WHO) urged rich countries to postpone this program due to concerns about vaccine supply to poor countries. where millions of people have not yet received the first dose of the Covid-19 vaccine.

“I will not be silent when the countries and companies that control the global supply of vaccines say that the world’s poor should be satisfied with the surplus,” WHO Director-General Tedros Adhanom said at a press conference on Tuesday. 9.

Tedros urged wealthy nations and vaccine manufacturers to prioritize the first shot of healthcare workers and vulnerable populations in poorer countries, rather than a booster dose. “We don’t want to see the booster shot widely available to healthy people who have completed the course,” Tedros said.

Nguyen Tien (Follow Times of Israel)

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