Flu season: Nearly 10 million sickened so far

This flu season is on track to be one of the worst in history in terms of the number of people infected. Flu is now widespread in almost every state. Nearly 10 million people have become ill so far. Pediatric deaths are double of what they were at this time last year. Dr. Tara Narula joins "CBS This Morning" to discuss why so many people have gotten sick this season.