弱毒 じゃくどくワクチンじゃなかったです
jakudokuwakuchinjanakattadesu

Noun
Desu Copula

The polite, past negative form of 弱毒ワクチン

1. Wasn't a weakened vaccine.; Wasn't a low-potency vaccine.

Past/Perfective
Negative
Polite
Casual Register