There have been 4.6 million flu cases across the U.S. since the season began — and 1,900 patients have already died from the illness, according to CDC estimates. Dr. Amanda Kravitz, a pediatrician, shares tips for how to try to keep your family healthy this holiday season and what symptoms to look out for. | CBS Mornings

The CDC is particularly concerned about the growing number of influenza cases, which are driven by a mutation of the virus that could evade flu vaccine protection. | WCNC Charlotte