- 新型冠状病毒感染防护手册（英文版）
- 王忠东 孙海燕主编
- 31字
- 2025-02-18 02:27:08
4. Who is at risk of COVID-19?
The general population is susceptible. COVID-19 is a new type of pneumonia caused by SARS-CoV-2. People are generally not immune and susceptible to COVID-19.
The general population is susceptible. COVID-19 is a new type of pneumonia caused by SARS-CoV-2. People are generally not immune and susceptible to COVID-19.