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Vaccine Epidemiology, Part Four: Yes, Vaccines Work!

By 

René F. Najera, DrPH

February 17, 2019

In this video, we talk about the evidence for vaccine efficacy and effectiveness. We know these values from experimental and observational epidemiological studies. It takes many years for a vaccine to go from idea to a product, and it takes a few more to understand its impact at the population level.

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