Different masks have different effectiveness in preventing the new coronavirus. Generally, disposable medical masks or N95 masks can prevent the spread of the new coronavirus, while ordinary masks do not prevent the spread of the virus. Meltblown cloth can adsorb or filter out virus particles, dust and other substances. Therefore, meltblown cloth will be added in the production process of medical masks and N95 masks to prevent the virus from spreading through droplets. The ordinary disposable masks do not contain meltblown cloth, usually used in cosmetology, dietary hygiene, etc., no role in preventing the spread of viruses. So when shopping for masks, in addition to choosing regular manufacturers regular channels to buy masks, but also to correctly select the type of masks, in order to effectively protect themselves.