The human immunodeficiency virus (HIV) is transmitted through blood and body fluids and gradually breaks down the immune system ­ usually over a three-to-15-year period ­ leading to acquired immunodeficiency syndrome, or AIDS.
Learn more about HIV/AIDS and Doctors Without Borders/Médecins Sans Frontières (MSF)'s response to the virus at www.msf.ca/en/hiv-aids
0:12 - What is HIV
0:23 - Transmission
0:34 - What kind of cells does HIV infect
0:55 - What are the impacts of HIV