Our expert says:
C&C, in theory if someone spits you with a mouth full of blood in the eye you might become HIV positive. You have to remember that there is a critical concentration of viruses per ml body fluid required before you will get infected (no, nobody knows what the exact concentration is). The body’s immune system will "zap" the HI virus as soon as it tries to enter the body and it is only when there are so many viruses that the immune system can’t kill them all before they can hide inside a CD4 cell that you’ve become infected. Let me know if you have more questions. Good luck.
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