感染 かんせん防止 ぼうしじゃなかったです
kansembōshijanakattadesu

Noun
Desu Copula

The polite, past negative form of 感染防止

1. Wasn't preventing infection.; Didn't prevent infection.; Wasn't infected.; Didn't get infected.

Past/Perfective
Negative
Polite
Casual Register