Their enthusiasm was 'infectious'. [='contagious']
viruses and other 'infectious' agents
an acute 'infectious' illness
(..) the rest that did it. And the climate. The climate. You're free to go, ser. This chamber is needed for the infectious, which you are no longer. Tarly, I'd like to speak with you in my study this evening. How bad is it? Suppose I'll find out (..)2017 TvShow: Game of Thrones Title: The Queen's Justice Season: 7 Episode 3