8 dic 1963 año - Albert Sabin (OPV)
Descripción:
The OPV is an oral vaccine that releases active viruses into the gut. It is a cheaper alternative to the IPV and does not need health officials to administer the vaccination.
Añadido al timeline:
fecha:
8 dic 1963 año
Ahora mismo
~ 61 years ago
Fotos:
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