What Came Before COVID-19: Two Centuries Of Vaccine Development

 
• By Brenda Sandburg
  
Vaccinating the poor of New York City against smallpox in 1872. In 1863, mass production of smallpox vaccine was developed, allowing for broad immunization of North American and European populations.
People in New York City recieve the smallpox vaccine, the world's first vaccine • Source: Shutterstock

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