The number of patients thought to be infected with the omicron BA.5 subvariant of the COVID-19 virus fell below 50% of all COVID-19 patients in Tokyo, indicating that BA.5 is being replaced by new omicron subvariants, according to materials released on Thursday by the Tokyo metropolitan government.
The omicron variant became the mainstream form in the seventh wave of infections in Japan in the summer of 2022.
