Workers make medical protective masks at a factory in Nanchang, Jiangxi province. [Photo by Hu Guolin/For China Daily] A video, claiming the sterilization processes of masks leave carcinogens on the products, has raised concerns among the general public last week. 所以, what exactly does happen during mask production? Is it really a cause for concern? 1. What is used to …

  Delta Variant Symptoms Are Similar The Delta strain does have similar symptoms to the original COVID strain but there are some important differences. 迄今為止, loss of taste and smell are not known as common signs of the Delta variant. The common symptoms associated with Delta are: • Sore throat • Runny nose • Fever • Headaches While fever …