嗜眠 しみん せい脳炎 のうえんでしょう
shiminseino uendeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 嗜眠性脳炎

1. Probably encephalitis.; Likely sleep-related encephalitis.

Polite
Presumptive
Conjecture
Medicine