At a university hospital in Shinagawa Ward, Tokyo, 80% of patients were confirmed to be infected with "BA.2", which is one of the Omicron strains and is highly infectious, by inspection at the time of admission.


In the last three weeks or so, the replacement has progressed at a stretch, and most of them are younger generations, but there are more cases where symptoms such as sore throat are stronger than the previous Omicron strains, and doctors will spread to elderly people at risk of becoming severe in the future. I am concerned.

Showa University Hospital in Shinagawa-ku, Tokyo is analyzing the type of virus for all new corona patients who are hospitalized to see if it is "BA.2".



According to the director of the hospital, Hironori Sagara, when we analyzed 164 viruses from people who tested positive in the hospital,


"BA.2" was


▽ less than 10% from the 2nd to the 5th of last month, but


▽ last month .

In the week from the 13th,


it accounted for about 50%, and in the week from the 27th of last month, it accounted for 80%.



It means that the replacement with "BA.2" has progressed at once in about three weeks.



In addition, 60% of "BA.2" patients in this hospital are in their 20s to 30s, but men in their 30s who have not been vaccinated have pneumonia and need to be given oxygen. In some cases, it has deteriorated to the state of "moderate 2".



Currently, there are 13 patients in the hospital, 9 of whom were "BA.2".



Also, 10 people were in their 20s and 30s.

Sagara Hospital director said, "I have the impression that BA.2 has stronger symptoms such as throat symptoms and malaise than the previous Omicron strains. Looking at the fact that even young people have stronger symptoms, in the future, We must be careful about how it affects older people at risk of becoming more severe as they grow older. It is important to stop the infection at this stage. "

Hospital director "People who have not been vaccinated may have pneumonia."

A man in his thirties who has been hospitalized at Showa University Hospital since last month was confirmed to be infected with "BA.2", which is one of the Omicron strains and is highly infectious, by a hospital examination.



Upon closer examination, CT images of men showed a wide range of pneumonia, which had worsened to "moderate 2", which required oxygen administration, and treatment is still ongoing. That is.



The man has no underlying illness, but he has not been vaccinated.



Sagara Hospital Director said, "This man has no underlying illness and was originally healthy, but he has very strong pneumonia that requires oxygen. I thought that pneumonia was relatively unlikely to occur with the Omicron strain. I feel that the number of people who have pneumonia is increasing these days. People who have not been vaccinated may have pneumonia, so we need to be careful. "