不ふ善ぜん感かん

noun

negative reaction; unsuccessful vaccination

Medical term for an adverse reaction to a vaccine or an unsuccessful vaccination. Used in clinical and public health contexts.

• ワクチン接せっ種しゅ後ごに不ふ善ぜん感かんが報ほう告こくされた。

  A negative reaction was reported after the vaccination.

• 不ふ善ぜん感かんの発はっ生せい率りつは非ひ常じょうに低ひくい。

  The incidence of unsuccessful vaccination is very low.