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Durante las décadas de 1970 y 1980 se introdujeron las vacunas formuladas con proteínas purificadas o polisacáridos capsulares (jan 16, 1970 – jan 23, 1990)
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By
victor
16 Nov 2017
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Date:
jan 16, 1970
jan 23, 1990
~ 20 years
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