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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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28 dic 1948 año - La edad de oro de la vacunación.Después de la vacuna de la poliomielitis, se desarrollaron vacunas frente al sarampión, l a parotiditis y la rubéola.
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victor
16 nov 2017
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339
fecha:
28 dic 1948 año
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~ 76 years ago
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