Hikers along the Pacific Crest Trail in Southern California have been hit with norovirus, but they’re not the only ones suffering. Wastewater data shows high levels in many states.

Food poisoning is serious. Even a perfectly healthy person can face severe consequences from a bad bout of salmonellosis. Here's what you should know.

Dozens of hikers have fallen ill while on California section of the 2,650-mile Pacific Crest Trail, authorities said. The ...

There are a handful of bacteria, viruses and even parasites that can live in sand and salt water. Learn how to minimize your ...