mask (surgical etc)

COVID-19 is an airborne infectious disease. Wearing masks, washing hands frequently, and maintaining social distancing all help slow the spread of the virus. Wearing masks reduces the risk of contracting airborne infectious diseases. Moreover, masks are inexpensive, allowing this method to be widely available. Although masks are a very simple tool, we should also learn to distinguish between different types of masks and their functions, as well as the precautions for using them, to avoid making mistakes.