Regarding the effectiveness of the new coronavirus vaccine, a group such as Kyoto University analyzed the data of more than 30,000 infected people in Japan reported in the month from the end of June using a mathematical model. The effectiveness of the was estimated to be 85% to over 90%.
This analysis was presented by a group of Professor Hiroshi Nishiura of Kyoto University and Motoi Suzuki, Director of the Epidemiology Center for Infectious Diseases, National Institute of Infectious Diseases, at an expert meeting of the Ministry of Health, Labor and Welfare on the 1st of this month.
The group analyzed the data of more than 30,000 infected people for one month from the end of June registered in the system "HER-SYS" that aggregates the infected person information of the new corona using a mathematical model, and classified by age group. Estimated the effectiveness of the vaccine.
As a result, the estimated efficacy of two doses of Pfizer vaccine is 89.6% to 93.4% for men in their 20s to 50s, 94.7% to 96.9% for women over 60s, and 96.9% for women. ▽ From the generation in their 20s to 50s, it was 85.4% to 91.8%, and in the generation over 60s, it was 92.6% to 96.1%.
Since the analyzed data corresponds to the time when the infection of the mutant virus Delta strain was spreading, the group can expect a certain effect on the Delta strain as well.