First, MASKS DON'T WORK. Social distancing and good hygiene help. Second, this virus has NOT been isolated. The CDC has buried this fact in their reports. There is NO ISOLATE, so what they have done is created an in vitro replication using the full base sequence released by China. How did China create a full base sequence? Good question!
I really want to reiterate MASKS DON'T WORK, at least not homemade cloth, surgical three layer ear loop style and there is no statistically significant evidence that N95 work, and that is according to decades of studies using medical professionals that know the proper way to use and handle masks. During the Spanish Flu the #1 cause of death was bacterial pneumonia....
The problem with people wearing homemade masks, or reused surgical (other than they don't protect against viruses), is they are getting sopping wet and are a breeding ground for bacteria and fungi. They can also concentrate rebreathed viral particles. The number one infection point for this virus is breathing passages (mouth and nose.) That's why it's important to not touch your face after touching contaminated surfaces. Watch people in public wearing these wet diaper masks. They're constantly fiddling with them, then TOUCHING EVERYING AROUND THEM.
In addition to masks' inability to prevent the spread of viruses, they have the negative effect of decreasing blood oxygen and increasing carbon dioxide. This puts stress on you heart and kidneys. There are many other potential hazards.
For those that will come at me for this. I could provide dozens of peer reviewed studies about the effectiveness of masks to prevent the spread of the flu virus, but I'll give this one link which references many sources https://www.sott.net/article/434796-The-Science-is-Conclusive-Masks-and-Respirators-do-NOT-Prevent-Transmission-of-Viruses