The first U.S. polio case was discovered in nearly a decade. Should you worry?

A Centers for Disease Control and Prevention scientist works with polio virus material. The first case of polio in nearly decade was detected in a New York patient Thursday. The individual was unvaccinated and likely contracted the virus from an individual outside of the country. (James Gathany/CDC)

Health officials in New York have discovered a case of polio in an adult — the first case in the country since 2013.

The good news is most people have nothing to worry about. "Unless you're unvaccinated," according to retired family physician and polio survivor Marny Eulberg.