Definitely good news, but as a very cautious old retired engineer (who spent his career worrying about how things can go wrong), I think I will continue to wear my mask indoors in public buildings for a bit longer.
Someone recently pointed out that in Asian culture, it has long been considered only polite for individuals with colds or other minor ailments to wear a mask in public. I know that I've seen people wearing masks in public in Japan, Korea and China, although I couldn't tell whether that was because they weren't feeling well, or just because the smog was so bad (especially in China). But the basic idea is a good one - perhaps that's a best practice we should adopt now that we all have masks.