Just going to add my opinion on whether we should wear masks or not. Firstly, we can all agree that a mask doesn't do f*ck all protection - particles will pass through bla bla.
If you are sick, you would generally wear a mask to prevent spreading. The mask is good at capturing droplets from the spreader. Can we agree on this?
If we do agree on the point above and given that you can contract Coronvirus with 0 symptoms, wouldn't it make sense that we all wear masks to prevent spreading?
So whats the point debating whether we should wear masks or not (for HK). Masks only work in a society where literally everyone is wearing one and that's pretty much 8/10 people in Hong Kong.
So yes, we should all be wearing masks when we go out in public, not for self protection, but for the main purpose of not spreading the virus if we catch it somehow without knowing.
Would I recommend my parents to wear a mask in UK? absolutely not because no one is wearing them in UK.