A high school teacher in Japan 's Chiba Prefecture was infected by the coronavirus after February 21 , 2020 .
On 21 February , two elementary school boys in Hokkaido and one preschool school boy were confirmed to be infected with the coronavirus , the latter coming back from an airlift out of Wuhan with his father , who was also confirmed positive with the virus.  ? g=eco & k=2020022101117On 22 February , a junior high school teacher working in Chiba Prefecture was confirmed to have the virus .
2020 coronavirus pandemic in Japan