Because having a STD compromises the immune system which will allow the virus to transfer more easily.
It's a very high risk.
STDs do not reduce the risk of getting HIV. In fact, STDs increase the risk of getting HIV. Any STD elicits an immune response. Its almost like ringing the dinner bell for HIV. Most infections pull CD4 immune cells (cells that HIV infects) to the site of infection (usually). This increases the risk of infection.
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If this is the only bodily fluid contact, then the risk of getting HIV is minimal. Saliva, sweat and tears have some traces of the HIV virus, but not enough to infect someone. No known cases of HIV have been transmitted by these methods so the risk is negligible. HIV is transmitted mainly through unprotected sex of any kind with an infected person. It can also be transmitted through contact with the blood of an infected person.
Being drunk has nothing to do with getting HIV. You get HIV if you have sex with someone who has HIV, whether you're sober or drunk.
Yes it does.
Anyone who engages in unprotected sex is at risk of getting infected with HIV. People who exchange needles with others are also at risk. Children born of HIV positive mothers and/or drink the breast milk of an HIV positive woman are also at risk.
Yes, a history of herpes doesn't provide immunity from chickenpox.
HIV/AIDS isn't that contagious, and there is very little risk of of catching it of someone unless there is a serious exchange of body fluids. Sharing needles and having sex can get you infected, but not everyday life. But a child getting born from a mother with HIV is at considerable risk.
If you are around someone with HIV you are ALWAYS at risk of contracting the disease, but HIV and AIDS are different. Just because you have HIV does not mean that you will contract AIDS, but you are much more likely to in the future. As long as you're careful and you are not letting this person bleed all over you you will be fine. Do NOT touch their blood if they're bleeding.
To use protection when you have sex. Wear condoms.
"Making out" with someone is not considered an "at-risk" activity for HIV infection. HIV is the virus that causes a person to develop AIDS. HIV is transmitted by contact with infected blood, semen, vaginal fluid and breast milk. Saliva does not pose a risk for infection.