@Denis130 I'm a home share host in the UK. With only one bathroom, shared by all. I host through Airbnb and a UK lodger finding platform. In the UK leisure travel was banned from late March - 3 Jul 2020, during November, and from early January 2021 til now and beyond.
I have continued to host from Lockdown 1 on 23 March 2020 till now. I've hosted at least one person throughout. Obviously during the travel bans, I've only hosted folk permitted to travel for work; doctors, nurses, carers, pharmacists, social workers, and engineers on a new water pipeline, and in the nuclear industry. - Skilled labour is in short supply here; health workers & engineers have to be recruited from 100 miles away.
Whilst I acknowledge that you can't eliminate ALL risk, I mitigate risk by no longer socialising with guests these days. When leisure travel is banned & I can only host travelling workers, they'll be too weary to socialise anyway! On arrival I show them the bedroom, bathroom & kitchen, as quickly as possible, then we have no more contact. When I have more than one guest in, they stay in their rooms (as most did before covid), so we are all in our one-man/woman bubbles. (There were couples when tourism was allowed last summer.)
I am encouraged by the UK government guidance re the circumstances under which someone must isolate following a covid contact, i.e. Isolation is only required if you have been WITHIN 2 METRES OF AN INFECTED PERSON FOR 15 MINS OR MORE. - So I figure, that IF my guests were infected, I'm never within 2m for 15 mins or more. So risk is low. (Viral load.)
I guess we all have to assess the risk for ourselves (within our countries' laws) .... I figure I have a good immune system, and at nearly 60 - well, could be better, could be worse!