It's National Public Health Week (NPHW) from April 7-13, 2025. We will host a special series everyday during NPHW - "How We Built a Healthier Communities ".From smallpox to COVID-19, vaccines have changed the course of history — saving millions of lives, eradicating deadly diseases, and transforming global health. In this kickoff episode of What is Public Health, I explore the history, science, and public health impact of vaccination, and reflect on what the world might look like if this breakthrough had never happened.Listen in to learn:How vaccines helped eliminate smallpox and nearly wipe out polioWhy vaccine trust and access remain urgent public health prioritiesWhat each of us can do to protect our communities through immunizationVaccines aren’t just a medical innovation — they’re one of the greatest success stories in public health.

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