12 ene 1968 año - Maurice Hilleman Creates an Improved Measles Vaccine
Descripción:
Using a weaker measles virus, the Edmonton-Enders strain vaccine is to this day the go-to for measles vacination, combined often with the mumps and rubella vaccines to make the MMR
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fecha:
12 ene 1968 año
Ahora mismo
~ 56 years ago