noun
viral pneumonia
Medical term for pneumonia caused by a virus, as opposed to bacterial or other types.
インフルエンザが原因でウイルス性肺炎を発症した。
He developed viral pneumonia due to influenza.
General term for pneumonia; ウイルス性肺炎 specifies the viral cause.
Compound of ウイルス (virus) + 性 (-like, -type) + 肺炎 (pneumonia).