The Power of Vaccines
Remember polio? Measles? Diphtheria? Smallpox? You may have encountered them as a child, or perhaps these diseases had already been obliterated when you were growing
Edward Jenner
Remember polio? Measles? Diphtheria? Smallpox? You may have encountered them as a child, or perhaps these diseases had already been obliterated when you were growing
Fourteen years ago, When I wrote Words to Live By: Reflections on