Great question for this time of the year.Tummy tucks and liposuction are elective, not emergency surgeries. Plastic Surgeons like their patients to be completely healthy before these procedure. There is no need to take any risks.During a tummy tuck your muscles are tightened. If your flu produces a cough, this can hurt the muscle repair. In addition, people have trouble taking deep breaths after a tummy tuck due to the upper abdominal muscle tightening. If you are not taking deep breaths, then you may be prone to getting a pneumonia.My advice is to go to a medical doctor and get a flu test to confirm the fact that you have the flu. If you do have the flu, it is best to recuperate and reschedule your surgery.Good Luck!