contagious
adjective uk/kənˈteɪ.dʒəs/ us/kənˈteɪ.dʒəs/
（疾病）接触性传染的
A contagious disease can be caught by touching someone who has the disease or a piece of infected clothing.
The infection is highly contagious, so don't let anyone else use your towel. 这种传染病极易传染，所以不要让别人用你的毛巾。
（人）患传染病的，带传染源的
A contagious person has a contagious disease.
Keep him out of school until he's not contagious anymore. 在他不再传染前，别让他上学了。
（情感）具有感染力的，蔓延的
A contagious feeling spreads quickly among people.
Fear is contagious. 恐惧是会传染的。