(CNN) -- Every year, it's the same battle. Every year, I urge my patients to get the influenza vaccine. And every year, they come up with a bucketful of excuses why they shouldn't. They're afraid, they say. It hurts, they say. It doesn't work, they say. It'll make me sick, they say. I understand the concerns, I really do. But the flu vaccine is safe and essential to nipping the seasonal ...