Their enthusiasm was 'infectious'. [='contagious']
viruses and other 'infectious' agents
an acute 'infectious' illness
(..) to have trouble. Now we're seeing more Western World breakdowns. And there's a clear pattern here which suggests an analogy... ...to an infectious disease process spreading from one resort area to the next. Perhaps there are superficial similarities to disease. lt's only a theoretical concept. (..)1973 Westworld