A small number of people never become infected with HIV despite years
of exposure to the virus. For example, they may have repeated, unprotected sex
with an infected person. These people are said to be HIV-resistant. These people are never infected, so they can't spread HIV.
HIV infection comes in three stages. The first stage is called acute infection or seroconversion, and it typically happens within two to six weeks after exposure or becoming infected. This is when the body's immune system puts up a fight against HIV. The symptoms of acute infection look similar to those of other viral illnesses and are often compared to those of the flu. The symptoms may last a week or two and then completely go away as the virus goes into a non-symptomatic stage.
The initial symptoms...