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How do Vaccines Work?
The first ever vaccine was created when Edward Jenner, an English physician and scientist, successfully injected small amounts of a cowpox virus into a young boy to protect him from the related (and deadly) smallpox virus. This video explains the science behind how vaccines work.
Bill Gates on Saving Lives with Vaccines
Bill Gates discusses the lifesaving power of vaccines. In particular, he highlights the case of polio, which is 99 percent eradicated and within reach of being the second disease to ever be completely eliminated from the world.
