Leslie Collier
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Leslie Collier is a scientist responsible for developing a freeze-drying method to produce a more heat stable smallpox vaccine in the late 1940s. [1]
Previously, smallpox vaccines would become ineffective after 1-2 days in ambient temperature
The development of his vaccine production method played a large role in enabling the World Health Organization to initiate its global smallpox eradication campaign in 1967.
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