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7 Feb 1926 Jahr - The first vaccine developed for whooping cough
Beschreibung:
Efforts to develop an inactivated whole-cell vaccine began soon after B.
Zugefügt zum Band der Zeit:
New timeline
By
Jonathan Rawlings
6 Nov 2018
0
0
138
Datum:
7 Feb 1926 Jahr
Jetzt
~ 98 years ago
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