As a result of analyzing the effect of the vaccine when the new coronavirus Omicron strain ``BA. %, according to research conducted by the National Institute of Infectious Diseases.
It has been shown that BA.5 may be more effective in preventing the onset of 3 doses of the vaccine.
Last month, the National Institute of Infectious Diseases and others analyzed the effectiveness of vaccines in preventing the onset of the disease based on data from 1,547 people who were tested for the new coronavirus at medical institutions in the Kanto region.
As a result, compared with unvaccinated people, the effect of preventing the onset was 35% in those who had received two doses of the vaccine for at least 5 months.
On the other hand,
it was 65% for those two weeks to three months after the third vaccination, and
54% for those three months or later.
At this time, the Omicron strain BA.5 was the main infection, so the research group indicated that the third dose of BA.5 may also increase the effect of preventing the onset to some extent. is.
Takaji Wakita, chairman of the Ministry of Health, Labor and Welfare's expert meeting, said, "Although there is little data, it is important that the vaccine is effective in preventing the onset of BA.5. The types of vaccines that can be administered are increasing, and new vaccines are also being developed. We should proceed with the third vaccination while having it included as an option."