Published in Vaccine Weekly, June 9th, 2004
Wehrle died May 11 of natural causes, his son Karl Wehrle said.
Wehrle helped develop the vaccination that led the World Health Organization to declare smallpox eradicated in 1980. In the 1960s as a medical officer for the WHO, he traveled to Nepal, India, Africa, South America and Afghanistan to administer the vaccine.
Wehrle also worked on the clinical trials for the Salk vaccine, which wiped out polio. First administered in 1954, the vaccine was named for its chief developer, Jonas Salk, MD.
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