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How does one contract the virus?

There are three ways in which HIV infection can be transmitted from one person to another:


  1. Unprotected sexual intercourse;
  2. Contaminated blood;
  3. From an HIV+ mother to her baby.

Read more about transmission in The Section about Transmission of HIV
In the section about Transmission through sexual acts, you can read more about:


  • Sexual intercourse with an HIV-infected person
  • How does HIV get into the body during sexual intercourse
  • Why are women more easily infected by HIV than men?
  • Can lesbians get Aids?
  • Can one be infected with HIV through having oral sex?
  • How many sexual contacts with an HIV-positive person are necessary before one becomes infected oneself?
  • Is it true that circumcision can protect males against HIV infection?
  • If I am HIV+, why should I still use a condom to protect myself?
  • Transmitting HIV through contaminated blood
  • How safe is our blood supply in South Africa?
  • The danger of sharing contaminated needles
  • The risk when one person has been accidentally exposed to the blood of an infected person?
  • How long can the virus survive outside the body?

In our section on Transmitting HIV through contaminated blood
you can learn more about this mode of transmission. Did you know that HIV can be transmitted by unsterile or dirty instruments used for circumcision? There are many other ways that HIV is transmitted though contaminated blood.
The HI virus can be transmitted from one person to another when:

  • A person receives HIV-contaminated blood in a blood transfusion,
  • When a person is exposed to needles that are contaminated with HIV-infected blood in the process of injecting drugs,
  • When a person (eg a health care worker) is injured with blood-contaminated needles, syringes, razor blades or other sharp instruments
  • Unsterile or dirty razors, knives, needles or other instruments are used during cultural practices such as circumcision, scarrification, or blood letting.

In our section on Mother-to-child transmission of HIV (MTCT), we cover the following:

  • Why are only some babies of HIV+ women infected and others not?
  • Should an HIV+ woman breastfeed her baby?

We also inform you about the Myths about the transmission of HIV and inform you how:

  • How HIV is not transmitted
  • Myths can be very dangerous

Provided by ArmMed Media
Revision date: July 8, 2011
Last revised: by David A. Scott, M.D.

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