infectious
adjective uk/ɪnˈfek.ʃəs/ us/ɪnˈfek.ʃəs/
C2 （疾病）传染性的
(of a disease) able to be passed from one person, animal, or plant to another
an infectious disease 传染病
C2 （人或动植物）传染的，具传染性的
able to pass a disease from one person, animal, or plant to another
an infectious patient 传染病病人
After the 21-day isolation period, Ebola survivors are no longer infectious. 经过21天的隔离期以后，埃博拉病毒幸存者不再具有传染性。
C2 有感染力的;有影响力的
Something that is infectious has an effect on everyone who is present and makes them want to join in.
an infectious laugh 有感染力的笑声
infectious enthusiasm 有感染力的热情