Among the confirmed cases on June 20, two were stall owners from the food court on the second floor of Tiankelong Supermarket. They were a couple and had no history of new contact. Beijing Haidian transfer personnel urgently launched an investigation and finally located the address of No. 70 Yongding Road. This place has been used as a venue for reporting confirmed cases four times. So how should we avoid being infected in public places. The first protective measure is to wear a mask, because most new coronaviruses are spread through droplets, which can block the transmission route. Secondly, do not go to crowded places and try to keep a distance of more than 1.5 meters from others to reduce the risk of infection. If there is nothing urgent, you should stay at home as much as possible so that you can self-isolate and better protect yourself from the new patient virus. 1. Avoid unprotected contact with farm livestock or wild animals. 2. Maintain constant ventilation in the workplace; wear masks and glasses in crowded public places to reduce the risk of exposure to pathogens.

3. When coughing or sneezing, completely cover your nose with a tissue or your sleeves or flex your elbow; throw the used tissue into a closed trash can immediately; after coughing or sneezing, use soap and Clean your hands promptly with water or alcohol-based hand sanitizer or alcohol-based wet wipes.

4. Wash your hands in time after going out and returning home. If you have fever and other respiratory infection symptoms, especially if the fever persists, go to the hospital in time.

5. All kinds of gatherings should be avoided as much as possible during the epidemic season of infectious diseases. People in public places should monitor their own health. If there are suspicious symptoms of novel coronavirus infection, such as fever, cough, sore throat, chest tightness, difficulty breathing, mild anorexia, fatigue, low energy, nausea and vomiting, If you have diarrhea, headache, palpitation, conjunctivitis, mild limb or back muscle soreness, etc., do not go to work sick. If anyone is found to have suspicious symptoms of novel coronavirus infection, staff should ask them to leave. Public items and public contact items or parts must be cleaned and disinfected frequently. Maintain air circulation in public places. Ensure that the air conditioning system or exhaust fan is operating normally, clean the air conditioning filter regularly, and open windows for ventilation. Restrooms should be equipped with enough hand sanitizer to ensure that water supply facilities such as faucets are working properly. Keep the environment hygienic and clean and clean up garbage in time. In disease-endemic areas, the public should try to avoid going to public places, especially places with dense crowds and poor air circulation. For the general public, first of all, try to reduce activities in places where there are many people and gather people; develop the habit of daily indoor ventilation; develop the habit of washing hands frequently, especially after sneezing or coughing Wash your hands with flowing water or soap and disinfectant; develop the habit of wearing a mask. Especially when you have some respiratory symptoms, you must wear a mask to protect yourself and others. Regarding the choice of masks, medical staff also remind everyone that if you go to public places, wearing a medical surgical mask is enough, and there is no need to over-protect.