This is the first survey result in the country regarding the so-called "breakthrough infection," in which infection is confirmed more than two weeks after vaccination with the new coronavirus.
In the three months to the end of June, 67 people were confirmed to be infected, and the National Institute of Infectious Diseases said, "Although it is not a result of denying the effectiveness of the vaccine, it is important to continue infection control after vaccination." ..
It is said that it takes 14 days to fully immunize after vaccination with the new coronavirus vaccine, but overseas, cases where infection is confirmed after that are rarely reported, and it is also called "breakthrough infection". I have.
The National Institute of Infectious Diseases conducted the first survey based on reports from local governments and medical institutions, and as a result, 67 people were confirmed to be infected in the three months until the end of June.
Nearly 80% were in their 20s to 40s, and no one was seriously ill.
Of the 14 cases in which the virus gene could be analyzed,
▽ 12 cases were the "alpha strain" of the mutant virus confirmed in the United Kingdom, and
▽ the "delta strain" confirmed in India was 2 cases.
In addition, infectious viruses were also detected in some samples.
The National Institute of Infectious Diseases said, "Although it is not a result of denying the high effectiveness of the vaccine, there is a risk of secondary infection, so it is important to continue infection control after vaccination. If infection is suspected due to symptoms, etc., it is necessary to actively test. "