Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Coronavirus Infections ?
    ### Response:
    Coronaviruses are common viruses that most people get some time in their life. They are common throughout the world, and they can infect people and animals. Several different coronaviruses can infect people and make them sick. They usually cause mild to moderate upper-respiratory illness.
    