Protect others, wear a mask.
When others wear a mask, they protect you.

US CDC seems considering urging public to wear a mask. It doesn't just come from the gov, it requires everyone contributes a bit.

Any mask is better than none.
Use DIY ones if N95/surgical mask in shortage. pic.twitter.com/6DV4pM2aOq

— LO Kin-hei 羅健熙 (@lokinhei) March 31, 2020