Vaccines

People from 7 months to 70 years old have fallen ill, and one quarter of the victims have been hospitalized. California officials say it's proof yet again of how easily measles spreads.

An outbreak among visitors to two California theme parks shows once again that this supercontagious virus doesn't respect borders. Most of the afflicted people had not been vaccinated.

From stylized photography that looks like a fashion shoot to a comic book journey about lockjaw, artwork from around the world illustrates the value of vaccines.

Amy Purdy lost both legs below the knee to meningitis at age 19. She's now using her cred as a champion snowboarder to encourage teenagers to get vaccinated.

Just getting a measles vaccine to a child in Pakistan was once an impossible dream. Despite many obstacles, health workers have made great progress in stopping infectious diseases.

It's called "breakbone fever" because that's how bad you feel when you get it. There's no cure. But scientists have found powerful antibodies that could lead to the development of a simple vaccine.

A major donor has pledged $300 million to distribute an Ebola vaccine in Africa, as soon as one is available. Vaccine development is proceeding, but there have been hiccups.

The experimental NewLink vaccine is based on a harmless virus that has been genetically engineered to incorporate bits of the Ebola virus. Testing of the vaccine has begun in healthy volunteers.