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. 2015 Jan 1;33(1):52–61. doi: 10.1016/j.vaccine.2013.11.066

Table 4.

Sources of prequalified vaccines.

Year No. of vaccine types Number of suppliers % from emerging economies
1986 6 13 13
1996 13 18 37
2006 24 22 55
2012 33 27 48