заразительный znamená v Angličtina

contagious▼(of a fashion, laughter, etc, easily passed on to others)
adjective
[UK: kən.ˈteɪ.dʒəs] [US: kən.ˈteɪ.dʒəs]

infectious▼((of feelings and behaviour) spreading quickly between persons)
adjective
[UK: ɪn.ˈfek.ʃəs] [US: ˌɪn.ˈfek.ʃəs]