also: ひゃくにちせき
noun
whooping cough; pertussis
Medical term for the bacterial respiratory infection characterized by severe coughing fits. Both ひゃくにちぜき and ひゃくにちせき are used, with ひゃくにちぜき being more common.
百日咳は乳幼児にとって特に危険な感染症です。
Whooping cough is a particularly dangerous infectious disease for infants.
百日咳の予防接種を受けましたか。
Did you get vaccinated against pertussis?