By Deborah Grigsby | Denver Gazette
It’s not unusual for health officials to see a rise in the standard trifecta of co-circulating winter viruses — influenza, RSV and COVID-19 — particularly as people return from extended holiday travel and gatherings.
But this year officials with the Denver Department of Public Health and Environment (DDPHE) said norovirus, a highly contagious stomach bug that causes vomiting and diarrhea, is a fourth component joining the mix.