An early and severe start to the flu season has many health experts concerned. On Friday, the Centers for Disease Control and Prevention reported 47 states are experiencing widespread activity, although it appears to be decreasing in some areas. According to the CDC, this is the most flu cases they've seen at this time of year in more than a decade. Twenty pediatric flu-related deaths have occurred since the start of the season. The CDC does not track adult flu-related deaths. The peak of the season, which usually happens in February, may be yet to come for most states -- officials said Friday it may be a week or two before it becomes clear whether cases have peaked. Here are some common flu questions from readers…