① 人から人へと伝染して流行する病気のうち、特に命にかかわるようなもの。
currently popular; in fashion; trendy
fashionable thing; popular thing; craze
going in and out of style; changes in fashion
big craze; boom; popular trend; widespread contagion; large outbreak
popular person; star; favourite; popular geisha
conjunctivitis; pink eye; epidemic keratoconjunctivitis