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They discovered the cure for ...

Before the term "vaccination" was coined, millions died every year from infectious diseases such as smallpox, tuberculosis and yellow fever. But the birth of immunology brought with it cures for some of the world's most deadly diseases. Click through the gallery to see who is credited with developing these life-saving vaccines:

Before the term "vaccination" was coined, millions died every year from infectious diseases such as smallpox, tuberculosis and yellow fever. But the birth of immunology brought with it cures for some of the world's most deadly diseases. Click through the gallery to see who is credited with developing these life-saving vaccines: