Crash Course Biology

Crash Course Biology - Season 2 Episode 39 How Do Vaccines Work?: Viruses & Vaccines

15:14 minutes 2025 HD

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From the flu to COVID-19, viruses are a major threat in our everyday lives. In today’s episode of Crash Course Biology, we’ll learn why viruses are like genes in a box, and how they invade and spread between cells. We’ll also discover how vaccines and medicines help our bodies fight back.

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