Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Malaria ?
    ### Response:
    Malaria is a serious disease caused by a parasite. You get it when an infected mosquito bites you. Malaria is a major cause of death worldwide, but it is almost wiped out in the United States. The disease is mostly a problem in developing countries with warm climates.
    