In the winter,the weather is very cold.Many people feel sick and get the flu in the winter.how do you know when you have the flu?you have a sore throat,your nose hurts and you have a headache.If you have a fever and your temperature will be higher than 37,you might have the flu.Don't worry.If you are sick,see the doctor.Take some medicine and drink more hot water.Stay in bed for a few days.Then you will feel better soon.