<s>[INST] What is the difference between HIV and AIDS? [/INST] HIV is the virus that causes AIDS. The HIV virus is what is transmitted from one person to another. Acquired Immune Deficiency Syndrome (AIDS) is the condition that develops when HIV weakens the immune system to the point that it can no longer fight off diseases and infections. The Centers for Disease Control and Prevention (CDC) defines an AIDS diagnosis as a CD4 lymphocyte count of less than 200 cells per cubic millimeter of blood (compared with about 1,000 CD4 cells for healthy people). Source: AUSTIN TEXAS. Link: https://www.austintexas.gov/page/hiv-faq . Field: Infectious Disease. Disease: HIV </s>