Most flu symptoms get better after 5 days. However, at times they can last for a week or more. You can feel drained for a few weeks even after the fever and aches are gone.
Try to avoid flu.
Try not to touch your eyes, nose and mouth. Germs are spread that way. Wash hands with soap and water/ sanitizer.
Keep people away from you if you suffer from flu symptoms. Cover your mouth and nose when you cough and sneeze.