Some people may not experience any symptoms however others may experience mild, flu-like symptoms around 2-6 weeks after infection. Symptoms are often mild and can be mistaken for other infections.
You cannot tell by looking at someone if they have HIV. The only way to know for sure is to get tested.
HIV slowly attacks the body’s immune system so that it can no longer fight off certain infections. A healthy immune system provides a natural defence against disease and infection; therefore if it is damaged by HIV, there is an increased risk of developing a serious infection or disease. It typically takes around 10 years for the virus to damage the immune system in this way. This will leave the body open to “opportunistic infections” and AIDS defining illnesses such as TB, pneumonia, and certain cancers of the immune system.