Viruses such as human norovirus can travel in vesicles, small fluid-filled sacs that are like shipping containers for cells.

Recreation in the Pittsburgh area should stay on land this weekend after a power outage Friday evening at the Allegheny County Sanitary Authority wastewater treatment facility. In an advisory late ...

Little progress has been made despite 40 years of cleanup on Leech Lake Reservation. Locals fear for the health of ...