He hasn't confirmed either way. No one knows what he did or what he got, if anything. Just a lot of finger pointing, diverting attention and non-committal bullshit.
Also
I scavenged last night , and got an anti infection kit
Can you copy and paste the exact words you received Mabs? As I received something similar, it wasn't called that.
Do we take it on face value that what Calaen says is truth though? If he isn't who he says he is, and infact is Patient Zero...it's a very clever move for Zero to make as for the rest of the game no one would vote for him.