Don't mind me, but if they are already infected, wouldn't the correct thing to get be a serum? Like, the thing you study at sixth or seventh grade (I got a bad grade at that and had to re-do the test so I remember it quite well)
"Vaccines prevent a disease and a serum is used when someone already has the disease, a vaccine has a weakened version of the virus or bacteria whilst the serum has the antibodies to beat the shit out of the virus or bacteria"
So I guess it is a serum there, but I'm the guy that's not fun at parties, so who cares anyway.