Violent, diarrhea-inducing stomach bug spreads in Northeast: ‘Incredibly contagious’ New York Post ‘Norovirus’ slams Northeast US hardest in recent weeks: CDC The HillNasty stomach bug takes gut-wrenching toll on N.J., northeastern states NJ.comFeeling sick? Philadelphia health officials urge caution amid spike in norovirus cases NBC 10 PhiladelphiaNorovirus in Philadelphia is on the rise, along with other stomach bugs The Philadelphia Inquirer