I too use protectors and wash them along with all the other bedding.
I heard, long ago, that putting pillows in the sun is a good thing to do (and it kills germs?) so have double the pillows I need for each so each party of guests gets a just-been-sunbathing pillow.
I have no idea if that is an old wives’ tale or if it’s true but I do it anyway. It may be that it kills off some nasties, especially here in South Florida with the pretty warm sun, but it’s probably not enough to kill off the coronavirus.
Like others, I don’t like the idea of sleeping on lysol-sprayed pillows but maybe lysol plus airing in the sun would be an answer.
I wash pillows periodically but I do see replacing them as a necessary expense as washing them seems to shorten their life. But there again, new pillows are a lovely thing for guests. Putting a tennis ball in the dryer with pillows (or duvets) seems to prevent the lumpiness by some weird sort of witchcraft.