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Medicines and equipment can easily go missing or expire–as 1.3 million doses of pentavalent vaccine (a kind of vaccine that protects against five diseases) did in Pakistan in 2015.—Brian M. Till, Foreign Affairs, 3 Nov. 2017 Our foundation and other partners worked with two vaccine companies in India -- Biological E Limited and Serum Institute of India -- to develop a pentavalent vaccine that would be affordable everywhere.—Bill Gates, CNN, 13 Oct. 2021 The pentavalent vaccine -- which protects against five diseases (diphtheria, tetanus, pertussis, hepatitis B and Haemophilus influenzae type B) -- is a great example.—Bill Gates, CNN, 13 Oct. 2021
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