Infection results from a sexual relationship with an infected person. The risk of infection increases according to the number of sexual partners one has, male or female. The more partners you have, the greater the risk of becoming infected with the AIDS virus. The virus then enters a person's blood stream through their rectum vagina or penis. If you have been faithful for at least five years and your partner has been faithful too, neither of you is at risk.
Mother can infect newborn.
AIDS affects certain groups of the population. Sexual partners of these high risk individuals are at risk, as well as any children born to women who carry the virus. Heterosexual persons are increasingly at risk. Donating blood is not risky at all. You cannot get AIDS by donating blood.