'He proved being inoculated with cowpox matter would prevent people from catching smallpox'
Edward Jenner
SCIENTISTS: He proved being inoculated with cowpox matter would prevent people from catching smallpox
He proved being inoculated with cowpox matter would prevent people from catching smallpox
He proved being inoculated with cowpox matter would prevent people from catching smallpox
SCIENTISTS
Jenner
SCIENTISTS