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- Season 2 Introduction to Biology
- Season 2 The Scientific Method
- Season 2 What Biologists Do
- Season 2 How Life is Organized
- Season 2 Why Did All These Elephants Die? (Intro to Ecology)
- Season 2 How Species Make and Break Friendships (Community Ecology)
- Season 2 How Did We Save The Bald Eagle? (Population Ecology)
- Season 2 What Is Climate Change?
- Season 2 The Effects of Climate Change
- Season 2 How Do We Keep Life's Jenga Tower From Toppling? (Conservation Biology)
- Season 2 What a weirdly long giraffe nerve can teach us about evolution
- Season 2 Microevolution: What's An Allele Got To Do With It?
- Season 2 Natural Selection: Life's Way of Stayin' Alive
- Season 2 Why do we have different skin colors? (Population Genetics)
- Season 2 Where Do Species Come From? (Speciation)
- Season 2 How did life begin? (Evolutionary History)
- Season 2 How We're All Related (Phylogeny)
- Season 2 Humans Develop Butt First (and other insights from the Tree of Life)
- Season 2 Humans Didn't Evolve From Chimps (Human Evolution)
- Season 2 What is Life Made of? (Carbon & Biological Molecules)
- Season 2 A Love Letter to H2O: Water & pH
- Season 2 How We See What We Can't See (Microscopes)
- Season 2 A Tour of the Cell
- Season 2 How Does Stuff Get Into Your Cells? (Cell Membranes)
- Season 2 How Do Cells Communicate? (Cell Communication)
- Season 2 How Do We Get Energy? (Chemical Reactions)
- Season 2 How do cells get their energy? (Electron Transport Chain)
- Season 2 Photosynthesis: The Original Solar Power
- Season 2 Mitosis and the Cell Cycle
- Season 2 Why Are All Humans Unique? Meiosis
- Season 2 Why Your Cat Looks Like That: Genetics
- Season 2 Nature? Nurture? Not so simple: Genetic Traits
- Season 2 Our Instruction Manual for Existing: DNA Structure & Replication
- Season 2 How mRNA helped save lives: DNA Transcription
- Season 2 How RNA gets translated into protein power
- Season 2 How Genes Express Themselves
- Season 2 Is drinking milk a Superpower? Genetic Mutations
- Season 2 We’re full of bacteria!
- Season 2 How Do Vaccines Work?: Viruses & Vaccines
- Season 2 Algorithms Aren’t Just for TikTok: Bioinformatics
- Season 2 Why We Aren’t Just One Big Cell: Multicellular Function
- Season 2 Plants Are Hardcore: Plant Anatomy & Physiology
- Season 2 The Poop Episode: How Animals Turn Resources Into Waste
- Season 2 Why You’re More Than Goo: Animal Infrastructure
- Season 2 How Skin, Snot, and Cells Keep Us Healthy: Animal Defense Systems
- Season 2 What REALLY Happens When You Step on a Lego: Nervous & Endocrine Systems
- Season 2 How Animals Do It: Sexual & Asexual Reproduction
- Season 2 Gender, Sex, & Sexuality: What’s the Difference?
- Season 2 Why This Toad is Bad at Jumping, and Other Mysterious Animal Behavior
- Season 2 The Dr. Sammy Show
Crash Course Biology - Season 2 Episode 39 How Do Vaccines Work?: Viruses & Vaccines
1.50 15 minutes 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.
