It has been recommended that all the people in the age bracket of 16 to 64 should get tested for AIDS at least once during their regular checkups. It is not necessary that AIDS will affect the people that are sexually active only.
AIDS can spread through various means such as the blood transfusion, syringes and much more. The HIV is present in the fluids in the body, and any activity that leads to the transfer of fluids can lead to the infection of HIV.
If you have been infected with HIV, the virus will only show in the tests after 4-6 weeks. In some cases, it might even take longer. So it is better to get tested for HIV regularly. Numerous ways can be used to test for HIV.