How does herd immunity work?
- 535,951 Views
- 4,711 Questions Answered
- Best of Web
How exactly do vaccines work? And how do we eradicate a disease? Explore the story of Smallpox— the first and only human disease to be permanently eliminated.
Vaccines for diseases like mumps and rubella offer a lifetime of protection with two shots early in life, so why do we need a new flu shot every year? Dig into the virology of influenza.
Create and share a new lesson based on this one.