I honestly think it's so contagious that there's nothing really you can do but mask up and get boosted.
I've had 3 shots, got COVID, and I expect to get it again. Especially since our kids go to crowded schools. They'll eventually bring it home for all to get and spread further.
"The BA.5 subvariant of the basic Omicron variant appears to be more contagious than any previous form of the virus. It’s apparently better at dodging our antibodies, too—meaning it might be more likely to cause breakthrough and repeat infections."
https://www.thedailybeast.com/why-the-new-ba5-covid-variant-is-the-most-dangerous-one-yet