A more effective and less gruesome smallpox vaccine was invented in 1796 and since then, American soldiers received the vaccine from the War of 1812 to World War II. Starting in World War I, the Army added vaccines against typhoid. During World War II, vaccines for influenza, tetanus, cholera, diphtheria, plague and yellow fever were also required. By 2006, soldiers in the armed forces received 13 different vaccines, with additional doses depending on location and regional conditions.
For example, for a child to enter kindergarten, the Florida Department of Health requires four doses of Diphtheria-tetanus-acellular pertussis (DTaP), four doses of polio (IPV), two doses of measles-mumps-rubella (MMR), two doses of chickenpox, Hepatitis B, and pneumococcal conjugate (PCV13), and haemophilus influenzae type b (Hib). When attending college, I had to show proof of vaccination for the same vaccines. Similarly, health-care and child-care workers are often required to show proof of vaccination for Hepatitis B, influenza, measles, mumps, rubella, pertussis, pneumococcal disease and varicella.