A person infected with a pathogen (virus, bacteria, etc.); a general term for someone who is infected, symptomatic or not.
感染者は病院の専用病棟に隔離された。
The infected person was isolated in a dedicated ward at the hospital.
新型ウイルスの感染者数が昨日さらに増えたと発表された。
It was announced that the number of infected people with the new virus increased further yesterday.
無症状の感染者でもウイルスを広げることがあるため注意が必要だ。
Even asymptomatic infected persons can spread the virus, so caution is necessary.
感染者と濃厚接触があった場合は速やかに検査を受けてください。
If you had close contact with an infected person, please get tested promptly.