Mutation

Amid the menace of the COVID-19 Delta variant, Japan found a new mutation of the virus on August 31. However, it's the first case in the country and the ninth case in the world. The mutation, N501S, was reported in a person who's already infected with the Delta variant, said Professor Hiroaki Takeuchi at Tokyo MDU Hospital. Besides, its impact on transmissibility is yet to be revealed through further study.