At present, there are many epidemic situations in Beijing. The symptoms of Omicron mutant are not obvious and infectious. On April 26, at the 316th press conference on the prevention and control of COVID-19 in Beijing, a reporter asked the public what occasions they need to wear N95 masks? Pang Xinghuo, deputy director of the Beijing CDC, said that citizens and friends should improve their awareness of epidemic prevention and control. Wear N95 mask in the following situations: when seeing a doctor in a medical institution or accompanying a doctor; When visiting the elderly, infants and people with basic diseases; During nucleic acid detection; When receiving express delivery and takeout; In the underground chess and card room, when there is a large flow and confined space; And when the risk is difficult to determine but needs to communicate with strangers, such as door-to-door service of maintenance or decoration personnel and communication with sales personnel, it is recommended to wear N95 mask. (outlook new era)