HIV is spread from an infected person through blood, semen, vaginal fluids, or breast milk. Intensity of viral concentration is highest in blood, followed by semen. The vast majority of HIV infections, estimated at 85%, are transmitted through sexual intercourse. The highest risk sexual practice for HIV transmission is anal and vaginal intercourse. Why? The virus enters the mucous membranes inside the anal or vaginal canal through "microtears" in the tissue. HIV has been known to be transmitted through oral sex, although this is considered a lower risk practice. Sharing needles passes blood directly from one person to another so this is a very easy and efficient way to spread HIV. Sharing needles is considered high risk. Mothers can also pass along HIV to babies before birth, during delivery and through breast milk.
HIV does not spread through skin-to skin contact like shaking hands and hugging. It doesn't even spread through casual kissing. In fact, only one case of intimate, tongue-to-tongue kissing has ever been shown to spread HIV and that was because there was blood exchanged from a wound in the HIV+ kisser's mouth. And since HIV can't survive outside the body very long, it can't be spread from a toilet seat, drinking fountain, doorknob, eating utensils, drinking glasses or food. Saliva, tears, sweat and urine do not contain enough virus to infect anyone through coughing, sneezing, crying, land sports or water sports. There are also no known cases worldwide of HIV spreading through mosquitoes.
Maybe. There is a risk of HIV transmission if the tools used to tattoo or pierce aren't properly sterilized and disinfected. If you are getting tatttooed or pierced, make sure the staff shows you how they prevent the spread of HIV and other blood-borne STDs like Hepatitis B. Well-run establishments will be happy to show you. If they brush off your concerns, turn and walk out.
HIV weakens the body's immune system. Without a strong immune system, the body is more vulnerable to "opportunistic" infections and types of cancers. Anti-retroviral drugs have done an excellent job of cutting down these infections, but without treatment, people living with HIV may be vulnerable to a wide variety of infections, parasites, and cancers including:
Use condoms each and every time you have sex. The best condoms for anal and vaginal sex are lubricated latex condoms. Lambskin condoms don't block HIV and STDs. If you're allergic to latex, use polyurethane condoms. When used the right way (every time), condoms are highly effective in preventing the spread of HIV and also protecting against many other STDs.
It is also important to know your own - and your partner's - HIV status. Getting an HIV and STD test is the first test toward protecting your own health and your partners. Get tested regularly, especially before starting a new relationship.
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