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First Vaccine for Hepatitis B (feb 21, 1981 – 23 h, feb 21, 1981 y)
Added to timeline:
A History of Technology in the 1980s
By
Lily Gosbell
17 Nov 2017
0
0
530
Date:
feb 21, 1981
23 h, feb 21, 1981 y
~ 23 hours
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