Airborne transmission risk of 2019-nCoV and indoor environment control strategy in transportation buildings

Presents the transmission risk and control strategy of 2019-nCoV in transportation buildings. Analyses the change rule of occupancy density, the proportion of infected persons and the ventilation dilution ratio in different types of transportation buildings. According to the infection probability evaluation model and safety dilution index, evaluates the indoor infection risk of different types of transportation buildings at different operation modes. The results show that by good environmental control means, the main passenger stay areas of the terminals and the railway stations are generally safe, with the low probability of 2019-nCoV infection. Proposes an indoor environmental control strategy based on the CO2 concentration. Suggests that the ventilation rate should be adjusted timely according to the indoor CO2 concentration to ensure the indoor safety level, which provides operational guidance for the 2019-nCoV prevention in transportation buildings under the background of orderly resumption of work and production in China.