How often is tetanus vaccination recommended for older adults? A) Yearly. B) Every 5 years. C) Every 15 years. D) Every 10 years. Vaccination: Vaccination is the process of using some weakened form of an antigen, a subunit of the an...
In 1796, aphysiciannamed Edward Jenner decided to prove a theory that had been circulating for some time. Smallpox once killed millions of people worldwide. Cowpox was a less serious disease related to smallpox that milkmaids often caught through exposure to infected cows. Jenner noticed that mi...