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AIzaSyCYaC8UkdPkQKLFUmpasLV5eC3M802CrcA
October 30, 2019
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jan 1, 1960 - Serogroup A and C Vaccines are Developed

Description:

*were only effective for a short period of time, prompting further improvement

Added to timeline:

11 months ago
0
0
43
Meningitis B Vaccine graphic

Date:

jan 1, 1960
Now
~ 59 years ago
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