Have you ever gotten a vaccine and wondered what it did for your body?
Is there really a link between autism and vaccines? Find the truth, on this Moment of Science.
A century ago, the average life-span for Americans was about 50 years. Today, the typical American lives to be about seventy-eight. What changed?
Vaccines consist of mild doses of disease-causing bacteria or virus that trigger the creation of antibodies that fight infection.
Modern medicine, along with better living conditions and healthier diets, enables many people to live into their seventies and eighties. Deaths due to infectious diseases like smallpox and polio have declined, and formerly fatal conditions like diabetes and heart disease can be kept in check.