9 Dangerous Diseases That Could Be Prevented By Vaccines Within The Next Decade, From HIV To Cancer

One of the best defenses we have against viral infections is the vaccine.

Vaccines prime the body's immune system to fight an incoming infection; they've been credited with the widespread eradication of smallpox and the near-eradication of polio.

There have been many major advances to vaccines since their inception in the 1700s, but there are still many diseases for which no vaccine exists.

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