By the time you feel the symptoms—those headaches and muscle aches, that dry cough and sore throat, and that pesky runny nose—your case of the flu is well underway. There’s little you can do at that point except rest up and ride the virus out. But once you’re back to good health, there’s plenty you can do to prevent another bout of the flu. And with any luck, practicing preventive measures early on might keep you from falling ill in the first place. Read more….