She has 'infected' everyone 'with' her enthusiasm. [=her enthusiasm has made other people feel enthusiastic too]
All the computers in the office were 'infected' by/with the same virus.
The virus has 'infected' many computers.
(..) I feel saturated by it. I can ... ... taste ... ... your stink. And every time I do, I fear that I have somehow been infected by it. It's repulsive. Isn't it? I must get out of here. I must get free. And in this mind is the key. (..)1999 The Matrix
(..) Can you come and help me? Gus! Gus. Babe, what's going on? GUS: Look. Gus, it's infected. (GAGS) (DRY RETCHING) Take a deep breath. Gus, I have to call somebody. No, no. Please don't call (..)2014 The Fault in Our Stars
(..) - I wasn't gonna. Oh, you looked like you would. - Is he coming back? - No. It's quite decisive. This bite is infected, you're going to have problems. And there's this. Now you know, I was not going to lick his... - You looked like you are. (..)2016 The Legend of Tarzan