Just did a mite treatment, lots of dead mites on pallet bottom boards. With the concern about viruses should we be doing anything additional?

Like, sanitizing the bottoms (with the dead mites on) with either a bleach solution ( 10 or 20%) or a sanitzer like is used in resturaunts & bars to sanitize glasses?

This also leads to another question, if hive does die from a virus infection, how long after the bees die off will the viruses be active and able to infect others?

Thanks, Larry