Before vaccines, some parents intentionally exposed their children to the virus. In the internet age, that thinking is resurfacing.

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 ...

If you developed a pox-like rash before this summer, you’d probably suspect chickenpox and call your doctor about next steps. But, now that monkeypox is circulating in the U.S. and cases continue to ...