History Of Vaccination
"Scientific medicine has taken credit it does not deserve for some advances in health. Most people believe that victory over the infectious diseases of the last century came with the invention of immunisations. In fact, cholera, typhoid, tetanus, diphtheria and whooping cough, etc, were in decline before vaccines for them became available - the result of better methods of sanitation, sewage disposal, and distribution of food and water."
Dr. Andrew Weil
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