Re: Odd...
Much as I dislike the masks, I'd have to disagree that their usefulness has been disproved. Their effect is marginal but not revolutionary, ie. symptomatic wearers are around 15% less infectious with them than without. In many situations this makes very little difference but in some it can be crucial, which is why they are standard practice in many hospital situations.
Masks lose their effectiveness over time, particularly as they become damp. They're pretty much useless outdoors but, where good ventilation and distancing is not possible, then they can make sense for a limited time but if you're going to spend any time with someone indoors then don't bother. More importantly, however, avoid crowds and, if you've got symptons, stay home. It's a pity these simple instructions are not repeated more often and clearly.