Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Asthma ?
    ### Response:
    Asthma is a chronic disease that affects your airways. Your airways are tubes that carry air in and out of your lungs. If you have asthma, the inside walls of your airways become sore and swollen. That makes them very sensitive, and they may react strongly to things that you are allergic to or find irritating.
    