The Covid-19 was discovered in 2019. Corona viruses are a large family of viruses known to cause colds and more serious diseases such as Middle East Respiratory Syndrome (MERS) and Severe Acute Respiratory Syndrome (SARS). Therefore, everyone should take precautions.
There are still many people who wear face masks wrongly, whether in a circle of friends or in real life. Recently, in response to the misunderstanding of ordinary citizens wearing masks, Liu Meng, a nurse from the International Medical Department of