There is generally no risk of aerosol infection in rural outdoor areas. Novel coronaviruses suspended in the air can form aerosols, and the probability of contracting the virus due to aerosol transmission in the open rural outdoors is very small if there is no source of infection. Even if there is an infectious source, the virus will be diluted quickly and the concentration will be significantly reduced. Even if healthy people who are far from the patient inhale, the dose will hardly lead to infection and there is no need to worry excessively. If indoors in rural areas where there is poor air circulation and an infectious source, the concentration of viral emission sources is strong and persistent, people around are still at risk of being infected and should be well protected.