Co-living house and tenant not getting along with other residents

[Carlos Lez]

I run co-living houses in San Jose CA. I have 3 students living in 3 different rooms of a SF house. Bathrooms and kitchen are shared.

One tenant writes :A confrontation occurred because I kindly asked a roommate to clear her dishes out of the sink so I would avoid contact with them as I was exposed to covid 19 and did not want to cross contaminate her dishes and I was told that since I was exposed to covid 19 that I am not allowed to use kitchen or bathroom. I am very angered because I pay to use the kitchen and restroom and I don’t know how I’m expected to live without using using the kitchen and bathrooms and utilities. If this continues to persist, I will not be able to live here and I would need my security deposit back. This is completely ridiculous and I was just stripped of using utilities here. I am pretty sure it is illegal for me not to be allowed to use the restroom and kitchen when I pay to use the restroom and kitchen"

This is all that I have from her in an email. Could someone help me respond to this? Given the COVID situation I am uncertain of how a landlord can/should get involved with this.

Thanks in advance for any advice.