Mask debate is something I have never expected before, maybe coz I live in Hong Kong, & masks have become a "reflex" for us after 2003 SARS.

What I think is, given ALL other measures heavily employed in countries couldn't slow the virus, why not try some fabric masks? No harm.

and @WHO, you praised China so vigorously for basically everything. You even praised their openness & transparency!!!!!! Why couldn't you just praise the thing they really did good, that is to require every citizen to wear mask in public?