Couriers can theoretically transmit novel coronaviruses. The main modes of transmission of novel coronavirus infection include droplet transmission and contact transmission. If a courier has novel coronavirus on its surface, it may cause novel coronavirus infection through contact transmission. Therefore, it is theoretically possible that items such as couriers could also be a vector for the spread of novel coronavirus infection. However, there are certain conditions for the transmission of the novel coronavirus by courier, and the courier must have a living novel coronavirus on it. Therefore, if the courier has not been contaminated by the novel coronavirus or has undergone effective disinfection and other related treatments, the possibility of spreading the novel coronavirus infection is very small. To sum up, it is necessary to be alert to the possibility of the transmission of novel coronavirus by courier, and the danger of the transmission of novel coronavirus by courier should not be over-exaggerated.