Still a lot of people in stores without masks.

"I don't feel like it"
"I already has the virus so now i am immune"
"I have a beard so can't wear a mask" (Da, that beard can hold virus droplets)
"Too much trouble"
"I lost it"
"You can't ask me because I have a handicap" (Yea probably mental)

I've heard these lately, all actual responses to "Where is your mask"

Instead of asking where their mask is, I might try "Do you need a mask?" while offering them one.

The 25% who might not accept the vaccine may well be the next listed in "deaths".