HIV Causes
HIV is not passed on easily from one person to another. The virus does not spread through the air like cold and flu viruses. HIV lives in the blood and in some body fluids. To get HIV, one of these fluids from someone with HIV has to get into your blood.
The body fluids that contain enough HIV to infect someone are:
- Semen
- Vaginal fluids, including menstrual blood
- Breast milk
- Blood
- Lining inside the anus
Other body fluids, like saliva, sweat or urine, do not contain enough of the virus to infect another person.
The main ways the virus enters the bloodstream are:
- 1) Thin lining on or inside the anus and vagina
- 2) Thin lining of the mouth and eyes
You cannot catch HIV from an infected person from:
- 1) Spitting
- 2) Contact with unbroken, healthy skin
- 2) Being sneezed on
- 3) Sharing baths, towels or cutlery
- 4) Using the same toilets and swimming pools
- 5) Mouth-to-mouth resuscitation
- 6) Contact with animals or insects such as mosquitoes
If someone with HIV has bleeding in their mouth, such as from open ulcers or sores, there is a very low chance that this could lead to transmission during kissing.
HIV infects cells of the immune system, the body’s defense system, making it unable to fight off infections. The virus enters the immune system’s CD4 cells, which protect the body against various bacteria, viruses and other germs. It uses the CD4 cells to make thousands of copies of itself. These copies then leave the CD4 cells, killing them in the process. This process continues until eventually the number of CD4 cells, also called your CD4 count, drops so low that your immune system stops working. This can take about 10 years, during which time you will feel and appear well.