HIV is an infection that can weaken a person’s immune system and their ability to fight infections. Over time, this can lead to people becoming sick or seriously ill. Symptoms of HIV can include sore muscles, feeling tired, night sweats, sore throat, fever, weight loss, swollen lymph nodes, but generally, people have no symptoms at all.
When HIV is in the body for a long time without any treatment, it can lead to the most serious stage called Acquired Immune Deficiency Syndrome (AIDS). During this stage, the immune system is so weak that rare infections and cancers may develop.