About this ebook
Vaccines have been used for more than 1,000 years! The first vaccine was made to protect people against smallpox. Today, vaccines help protect people from many diseases and illnesses. This title walks readers through the history of vaccines, how they work and impact our lives, and what we may expect in the future. Features highlight an inventor and a specific vaccine, show how many vaccines work, and more. Readers will have a new appreciation for this life-saving invention!
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