SciShow
Masks? Handwashing? Sanitizer? — How to Protect Yourself from Coronaviruses
Today, we all do our best to protect ourselves from coronaviruses. But a lot of what people are doing doesn’t really help, and it could take away supplies from those who actually need them. Hank explains what does help, and how it...
Crash Course
Crash Course Biology #32: Your Immune System Natural Born Killer
Hank tells us about the team of deadly ninja assassins that is tasked with protecting our bodies from all the bad guys that want to kill us - also known as our immune system. [15:02]