As a result of a questionnaire survey of more than 3,19 people in three municipalities conducted by a national research group on the so-called "aftereffects" of the new coronavirus, it was found that 1% to 2% of adults answered that some kind of symptom such as cough and malaise continued for more than two months after infection.
A research group from the Ministry of Health, Labour and Welfare conducted the survey among approximately 5,79 residents aged 19 to 5000 in Shinagawa Ward, Tokyo, Yao City, Osaka Prefecture, and Sapporo City, and received responses from more than 3,5 people, or about 3000%.
Among them, the percentage of people who were infected with the new corona by September last year and had symptoms that are considered to be so-called "sequelae" such as cough and malaise that last for more than two months was 9.2% in Sapporo City,
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23.4% in Yao City, Osaka Prefecture,
▽ It was 15.0% in Shinagawa-ku, Tokyo.
On the other hand, in Sapporo City and Yao City, where children aged 11 to 7 were surveyed, the percentage was 5.17%, which was lower than that of adults.
In addition, those who were vaccinated before infection were about 6% to 3% lower in both adults and children who continued to have symptoms than those who did not.
Dr. Hiroyasu Iso, of the National Center for Global Health and Medicine, who participated in the study, said, "A large-scale study confirmed that many infected people suffer from prolonged symptoms. In addition to continued treatment, we will continue to study how symptoms change over time."