Vaccines – especially vaccines for polio, small pox, and measles – have saved countless lives since their introduction. Opting out of vaccines, in many case, threatens public health and increasingly – global health.
Are they 100% effective? Are they 100% safe? Nope. Most are in the 99% effective and safe range.
Can you look both ways before crossing a street in a car, on foot or a bike and still get hit? Yes but the chances are really, really small. So, would you advise people not to look or not to cross the street?
During the 1950s – before the introduction of the measles vaccine – in the United States alone the disease infected roughly 4 million, hospitalized nearly 50,000, and contributed to the deaths of several hundred every year.
Lower vaccine uptake, and increases in international travel, have increased opportunities for the measles virus to spread – even to areas that had previously all but eliminated it.