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-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 ...
In the 1990s, an average of 4 million people per year contracted chickenpox in the United States. Now that vaccines are widely available, this number has dropped to about 350,000 per year. After a ...
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