This is gearing up to be one frightening flu season. All Ebola hysteria aside, as early as August, intensive care units at Midwestern hospitals were filled with children suffering from human enterovirus, a rare strain of a common cold that goes from bad to worse within hours, making it difficult for kids—especially those with asthma—to breathe. Like all viruses, antibiotics can’t help. The only thing to do is treat the symptoms by keeping airways open. Obviously, if you have a cough or a wheeze that won’t go away, see a doctor immediately—and head to the E.R. if you can’t breathe. But for less serious—but still uncomfortable—scenarios, it’s good to have help on hand.…