We worry about the wrong things. We worry about shark attacks although we’re more likely to be killed by lightning. We worry about flying although we’re more likely to be killed in a car. We worry about Ebola, but we are far more likely to die from the flu. We worry about the inconvenience and discomfort of a flu shot, but without the shot as many as 20 percent of us may suffer the far worse symptoms of the flu this year.