Vaccination disease people tried to prevent by inoculation and was the first disease for which a vaccine was produced. The smallpox vaccine was invented in 1796 by English physician Edward Jenner and although at least six people had used the same principles years earlier he was the first to publish evidence that it was effective and to provide advice on its production. Louis Pasteur furthered the concept through his work in microbiology. The immunization was called "vaccination" because it was derived from a virus affecting cows ( 'cow'). Smallpox was a contagious and deadly disease, causing the deaths of 20–60% of
Vaccination schedule shot, can be given before or during pregnancy, depending on whether or not it is flu season. Vacinnation is safe right after giving birth, even while breastfeeding. In 1900, the smallpox vaccine was the only one administered to children. By the early 1950s, children routinely received three vaccines, for protection against diphtheria, pertussis, tetanus and smallpox, and as many as five shots by two years of age. Since the mid-1980s, many vaccines have been added to the schedule. In 2009 the US Centers for Disease Control and Prevention (CDC) recommended vaccination against at least fourteen diseases. By two years of