North Texas health officials urge flu shots as new mutation spreads [UbvWjADpGt8]
Doctors are seeing a slight uptick in the number of positive flu cases across North Texas, largely due to a new mutation known as "subclade K." Subscribe to FOX 4: Dallas news, weather, sports and traffic from KDFW FOX 4, serving Dallas-Fort Worth, North Texas and the state of Texas. Download the FOX LOCAL app: fox4news.com/foxlocal Watch FOX 4 Live: Download the FOX 4 News App: Download the FOX 4 WAPP: Follow FOX 4 on Facebook: Follow FOX 4 on Twitter: Follow FOX 4 on Instagram: Subscribe to the FOX 4 newsletter: