Blood clots formed during flights are the most common hazard of air travel.  The cramped seating of airplanes has given hack to comedians a lot of material, but when it comes to a serious threat to our health we need to THINK  PREVENTION.  Every year 30,000 people die from flight-related DVT around the world.  Please were your compression stockings during long flight or road travel. https://www.clotcare.com/dvt_pe_blood_clot_patient_stories.aspx