Crystal Poster ｜ How long does it take to change the mask?A lot of people care

At present, the correct mask is an effective way to block the spread of new coronal virus.On August 30, the Shenzhen Municipal Centers for Disease Control and Prevention reported that relevant studies showed that scientific and correct wearing masks can generally reduce the risk of infection by more than 80%, and it is recommended to change the mask every 4 hours.

Source ｜ Jingbao APP

Coordinating: Wang Biao

Reporter: Wang Biao Ye Changwen

Figure: Xu Qingdong

Edit: Chen Zhangwei

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