What are the rules in assisted living about showering with COVID?

I work at assisted living where they share showers. Now we a break out with covid, and I had to give a shower to 2 husband and wife, they both have covid, to get to the shower they had to walk through hall to get there we did one at a time. Now I feel they should have got washed up in there room because they both had covid instead of maybe infecting other residents. can anyone tell me the rules of assisting living an showers with covid.