Welcome and thanks for your query in HCM.
Before giving answer to all of the 3 question, just answer one simple question. Can you judge/check the poison in food from just a distant superficial look ??
I think now you will be able to understand the answers of your queries:
patients appears healthy as we do. So your girl or her contacts appearing healthy might be a carrier of the infection or might be window period that the girl or her contacts themselves also might not be knowing. It is not written on anybody's forehead that he/she is HIV positive. Do you know which of those 4-5 guys are having any STD
. Have you ever seen HIV/AIDS
patients or to frankly say HIV basically because AIDS is having multiple symptoms but HIV is just infection not manifestation.
2. The second question is just like the first question with bit change in words. Definitely if girl have multiple contacts is considered high risk behavior for HIV and other STD's.
3. For the third question it is same as above a man with multiple unprotected contacts is certainly a high risk behavior for HIV and other STD's.
You might have not asked the fourth question but let me give you advise that in today's world of HIV condom is like helmet on two-wheelers, so one who wears it do not bears any STD.
Dr Sanjay K Kanodia
MD ( Dermatology and STD/ Venereology)