As of 2009, more than 33.3 million people worldwide have HIV/AIDS. Most live in developing nations, but more than one million live in the US; of these, 21% are unaware of their infection.
Most people have few symptoms in the first stages of HIV, but may experience influenza-like illness including fever, headache, tiredness and enlarged lymph nodes around the neck and groin area. Testing for HIV is the only way to identify patients who are infected.
Learn more about skin conditions that may occur in later stages of the disease.