Vaccines are among the most closely studied medical interventions in history — yet they’re also surrounded by persistent myths, misinformation, and fear.

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The Vaccine Safety Series within Infectious Dose takes a careful, evidence-based look at how vaccines are developed, tested, monitored, and evaluated over time. Episodes examine common claims and controversies — including ingredients, schedules, pregnancy, autism, and post-licensure safety monitoring — and walk through what the science actually shows, how we know it, and where uncertainty does (and does not) exist.

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Each episode includes a companion blog post with near-full transcripts, citations, and direct links to primary sources, including peer-reviewed papers and regulatory documents. The goal isn’t to persuade through rhetoric, but to provide transparent, well-sourced information so listeners can make informed decisions grounded in evidence.