3M masks can prevent the new coronavirus, but it depends on which type of 3M mask. Generally speaking, disposable surgical masks and N95 masks can prevent new coronaviruses, so you should choose disposable surgical masks and N95 masks when choosing 3M masks. Because the above 2 masks have been tested in the factory, they can block about 95% of particles and dust, and can effectively isolate and block droplet-borne diseases. Therefore, you must recognize the model and type when choosing 3M masks, otherwise other masks may not have the role of anti-new coronavirus.