Adolescent Adult Aged Aged, 80 and over Canada--epidemiology Child Child, Preschool Communicable Diseases--epidemiology Databases, Factual Female HIV Infections--epidemiology Humans Infant Infant, Newborn Internationality Male Middle Aged Population Surveillance Sentinel Surveillance Transients and Migrants--statistics & numerical data Travel--statistics & numerical data Tuberculosis--epidemiology Young Adult