The National Institute of Infectious Diseases examined 21 infected persons in Japan for the new coronavirus Omicron strain, and tentative findings indicate that no infectious virus was detected 10 days after the onset or diagnosis. I summarized.

Groups such as the National Institute of Infectious Diseases investigated how long infectious viruses could be detected in a total of 21 people, including 17 mild and 4 asymptomatic individuals infected with the Omicron strain in Japan. ..



As a result,


▽ mild cases did not detect the virus after 10 days from the onset date, and


▽ asymptomatic people did not detect it after 6 days after diagnosis.



On the other hand, the PCR test, which can detect if a part of the virus gene remains, was positive even after the second week.



The National Institute of Infectious Diseases said that this survey was a tentative report, and that the Omicron strain had been vaccinated, and that in mild and asymptomatic people, the infectivity was 10 days after the onset or diagnosis. It seems unlikely that a virus has been released.



Regarding the Omicron strain, when an infected person who was hospitalized was discharged from the hospital, it was necessary to have a negative test twice in a row, and there was concern that the hospitalization would be prolonged, but the country has been vaccinated from the 5th. If so, as with the conventional new coronavirus, discharge is permitted 10 days after the onset or diagnosis.

Keywords: