Add Yahoo as a preferred source to see more of our stories on Google. Chicken pox can spread quickly in people who aren't vaccinated. (Illustration: Liliana Penagos; Photo: Getty Images) (Illustration ...

The varicella vaccine is highly effective and decreases chickenpox cases significantly. Chickenpox is contagious 1-2 days before you develop a rash and until all blisters crust over. If untreated, ...

It all started with an unremarkable trip to grandma’s house in 1970. But two days into the visit, something went terribly wrong. The 9-month-old grandson fell ill. First, a fever. Then, a nasty rash.

The varicella-zoster virus causes both chickenpox and shingles infections. Initially, the virus causes a chickenpox infection. If it reactivates later, shingles can develop. The chickenpox vaccine ...

The Hawaii Department of Health reports the community outbreak of chickenpox on Kauai has expanded, raising concerns the highly contagious disease will continue to spread. In addition to the five ...

Smallpox is an often deadly, contagious disease that holds a unique place in medical history. Back in the 18th century, biologist Edward Jenner invented vaccination by giving people a less-virulent, ...