There's a LOT of PR involvement in all of this kind of stuff and images heavily edited or excluded if the PR guys think it might get a bad reaction. Not even masks, even down to the balance of individuals, or how the layout might appear - e.g. imagine a picture where you have an all-white crew standing around giving directions to a black actor who's on his knees.

Absolutely absurd dumb shit that only idiots would make a drama about. But in Hollywood they try to be meticulous about this stuff.

So likewise with maintaining the use of masks and vaccines well beyond the point of necessity. The concern is all about whether pictures and reports of people not wearing masks will reflect badly on the industry, not whether it's necessary.