Every year, influenza, commonly known as the flu, affects millions of people around the world. For many people, the illness causes several days of coughing, sneezing, fever, fatigue, headaches, and muscle aches before they recover. Most healthy adults begin feeling better within a week or two. However, the flu is far more than just a […] The post Why One Flu Shot May Keep More Older People Out of the Hospital appeared first on Knowridge Science Report .