HIV, or Human Immunodeficiency Virus, is a virus that attacks your immune system. Once the virus gets inside your body you may not feel or look sick for years but you can still infect others. Over time, your immune system will grow weaker and you can become sick with different infections and illnesses.

You have AIDS, or Acquired Immunodeficiency Syndrome, when HIV has attacked and destroyed enough of your immune system that your body is no longer able to protect you like it should from cancers, infections and other diseases. AIDS is not a disease onto itself, but a collection of systems that are the sign saying your immune system has fallen apart.

Learn more in the HIV/AIDS FAQs section.

The Surveillance and Risk Assessment Division of the Centre for Communicable Diseases and Infection Control, Public Health Agency of Canada conducts national surveillance and research on the epidemiology of HIV/AIDS and other blood-borne and sexually transmitted infections. As part of this mandate, HIV/AIDS Epi Updates are produced to summarize recent trends and developments related to the HIV situation in Canada.  The report is available here: HIV/AIDS Epi Updates.

The Public Health Agency of Canada’s Report on Sexually Transmitted Infections in Canada: 2009 is an overview of reported cases and trends in the three nationally reportable STIs: chlamydia, gonorrhea, and infectious syphilis by age, sex, and location for Canada for each infection.  This report is available here.