Viruses and Vaccines: How Do Vaccines Work?: Crash Course Biology 39

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. Introduction: Discovering Viruses 00:00 What We Have in Common With Viruses 1:24 Evolutionary Theories of Viruses 2:49 Hosts & Infection 3:55 Retroviruses 6:49 Vaccines 8:11 Dr. Quarraisha Abdool Karim & Antivirals 9:41 Review & Credits 11:39 This series was produced in collaboration with HHMI BioInt...