According to an analysis by Nagasaki University and others, 78.2% of patients who were hospitalized with four doses of the new coronavirus vaccine were prevented from becoming severely ill when the Omicron strain BA.5 became mainstream. got it.
Groups such as Nagasaki University reported that from July to September last year, when Omicron strain BA. , I checked the vaccination history, test results, symptoms, etc.
According to the results presented at an expert meeting of the Ministry of Health, Labor and Welfare last month, when analyzing the rate of severe illness among people hospitalized with the new coronavirus, those who received two doses of the Pfizer or Moderna vaccine compared to those who did not. In comparison, it was 16.3%, 56.9% for those who received 3 doses, and 78.2% for those who received 4 doses.
In another analysis, the rate of hospitalization was 58.2% lower for those who received two doses, 72.8% for those who received three doses, and 84.8% for those who received four doses.
This time, most of the vaccines that were inoculated during the analysis period were conventional vaccines, and although the research group was a provisional analysis result, there was a tendency for the effectiveness to increase as the number of vaccinations increased. .
Haruka Maeda, a specially appointed researcher at Nagasaki University, said, "Even conventional vaccines are considered to be effective in preventing the severity of 'BA.5'. If the second or third vaccination is over and time has passed, Additional vaccinations can be recommended even for young people.”