My theory has always been science is not driving the mask/nomask discussion. It's product availability. In the beginning (February) there were nowhere near enough masks available to try to force the general population to wear them, and that changed, not because of new revelations about the utility of masks, but because mask inventories had been ramped up.
Now that there are plenty of masks, the government masters are free to demand 100% compliance. And so we see people like the Governor of Texas, not known for obeisance, mandating the wearing of masks. For all his good works and atta-boys, Abbot will be remembered for this cowardly cave-in, and that's too bad for him. There's a rule in the corporate world: One "Aw-shit" cancels all previous "Atta-boys."
After paying the price for standing up to the left-bleep, Abbot will now pay a price for capitulating and his "friends list" collapses. This will be the highest office Abbot will ever hold...a career-ender.