Kissing an HIV infected person
Few years back, I had seen an advertisement that AIDS spreads through blood transfusion and there is no problem in kissing HIV infected person.
Since then I have this question, does not saliva transfer from one mouth to other ? Can it not spread AIDS ?
If not, then great. But what if HIV infected person has some dental problem and some blood is coming out from gums ? (I am quite healthy orally, but still when I brush my teeth sometimes blood comes out). Can such a blood transfer not happen while kissing ? Can a person not be infected by such a blood transfer ? If yes, then are such advertisements are not misleading ? In fact are not such advertisements spreading AIDS ?