Below is an instruction from Human. Write a response.
    ### Instruction:
    How to prevent Pulmonary Embolism ?
    ### Response:
    Preventing pulmonary embolism (PE) begins with preventing deep vein thrombosis (DVT). Knowing whether you're at risk for DVT and taking steps to lower your risk are important.
                
Exercise your lower leg muscles if you're sitting for a long time while traveling.
    