The booster shots of the COVID-19 vaccine have certain effectiveness

This is the conclusion drawn from the studies of Japanese and Israeli scientists.

A research team from the Japanese Ministry of Health, Labor and Welfare (MHLW) conducted antibody density analysis in 440 medical staff during 1 and 3 months after receiving the injection. COVID-19 vaccine increase. These are people who get antibodies from vaccination, not from infection with the SARS-CoV-2 virus. In the first two doses, they were all vaccinated with Pfizer’s vaccine.

The analysis results showed that, one month after the third injection, the average antibody concentration of people vaccinated with Pfizer’s vaccine was 52.1 times higher than the time before injection. Three months after injection, the average antibody concentration was only 27.5 times higher. For people vaccinated with Moderna’s vaccine, antibody levels at 1 month and 3 months after injection were 70.3 times and 36 times higher, respectively, than before.

The booster shot is especially effective for the elderly and people with weakened immune systems. (Photo: AP)

Professor Suminobu Ito of Juntendo University, who led the study, said that, although the antibody concentration dropped to nearly half in the three-month period since the third injection, it was still quite high and therefore still quite high. , the vaccine still has some protection against SARS-CoV-2 virus. Professor Ito emphasized, the group is currently focusing on analyzing the effectiveness of booster shot for the original SARS-CoV-2 virus, while accurately measuring the effect of this injection on Omicron variant very difficult. However, according to Professor Ito, it is likely that the effectiveness of this injection against the Omicron variant will not decrease drastically.

Meanwhile, research by Israeli scientists shows that the fourth dose of COVID-19 vaccine can reduce the risk of death by 75% in people over 60 years old.

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