If we’ve had vaccines for the polio virus for almost 70 years, why haven’t we been able to fully eradicate it from the globe? Hosted by: Hank Green (he/him)

Vaccines mean that there are now very few new polio cases, but in the early 1900s this wasn't the case. Learn how two scientists, Salk and Sabin, virtually wiped out this potentially deadly disease. Biology - Healthy Living - Polio is a...