American microbiologist Maurice Ralph Hilleman was born in 1930 in Montana., Hilleman had to work on the family farm from a very young age to make money., After many years, his older brother intervened and convinced him to study at university., He received his doctoral degree in microbiology from the University of Chicago in 1944., In the late fifties, he became the head of the virus research department of an international pharmaceutical company., Throughout his career he developed over 40 vaccines that have saved millions of lives..

Aptis Reading Part 2 - Test 2

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