Five things you should know about this year's very bad flu

The nation is having a terrible, horrible, no good, very bad flu season.Flu is widespread in 46 states, according to reports to the Centers for Disease Control and Prevention.Nationally, as of mid-December, at least 106 people had died of the infectious disease.In addition, states across the country are reporting higher-than-average flu-related hospitalizations and emergency room visits. Hospitalization rates are highest among people older than 50 and children younger than 5.In California, which