Pandemic smallpox was responsible for 300–500 million deaths. As recently as the early 1950s, an estimated 50 million cases of smallpox occurred in the world each year. After successful vaccination campaigns throughout the 19th and 20th centuries, the WHO certified the eradication of smallpox in December 1979. To this day, smallpox is the only human infectious disease to have been completely eradicated, and one of two infectious viruses ever to be eradicated. Historically, measles was prevalent throughout the world, as it is highly contagious. According to the U.S. National Immunization Program, 90% of people were infected with measles by age 15.
Certified first responder or receive this type of training because they are likely to be first on the scene of a medical emergency, or because they work far from medical help. Some of these non-traditional first responders include: Certified first responder "For the more current term, see Emergency medical responder" A certified first responder (Also called an Emergency Medical Responder, Emergency First Responder, Medical First Responder, or First Responder) is a person who has completed a course and received certification in providing pre-hospital care for medical emergencies. Certified individuals should have received much more instruction than someone who is trained in basic first