As soon as he arrived in the village, people suspected he might have the virus, so he was placed under quarantine.
この場合、次のような言い方ができますよ。
ーAs soon as he arrived in the village, people suspected he might have the virus, so he was placed under quarantine.
「彼は村に着くとすぐ、ウイルスの感染を疑われ隔離された」
to be placed under quarantine で「隔離される」
ご参考まで！
カナダ 
