On March 22, Tainan City announced one newly confirmed case#22175, a teenage boy, living in Xinying District. Case#22175 is an asymptomatic case and has received full three doses of the COVID-19 vaccine. Because he was under home isolation during the contagious period, there is no activity footprints in Tainan city, and the risk of community infection is relatively small.
Case#22175 is the son of case#21422 and case#21392. Due to case#21392 was announced as a confirmed case on March 13, then case#22175 was identified to undertake home isolation. Before the expiry of his quarantine period, he was arranged by the health bureau to take the specimen test, then got a positive diagnosis, and the Ct value was 22.17.