Lola says they can...
And why can't my white blood cells fight the disease? And how would you go about sucking out the blood again?
if you think it is like rattle sanke posion, where if you get the venom out in time you dont suffer the efects, you are wrong. it wont work, trust me.
As for the blood cells, most of the time, when someone is bitten/scratched, the white blood cells try to fight it so much, it kills the victum. you, however, did not suffer through that. Thankfuly.