Immune System & Disease

25 Facts About Vaccines That Answer the Questions Most People Are Afraid to Ask

Fact 1 of 254%

Smallpox was completely eradicated from the wild by human intervention.

Historic vials used in the global eradication campaign.

Smallpox is the only human infectious disease to be completely eradicated from nature through vaccination. Before the 1980 declaration, this virus killed hundreds of millions of people worldwide.

"Smallpox killed an estimated 300 million people in the 20th century alone."

This achievement proves that global coordination can eliminate deadly pathogens permanently from the human population.

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