How can they stay at home, if they don’t have one?

My name is Robin, I am 30 years old and a volunteer of the Swiss Youth Red Cross.
I was volunteering with refugees in Calais, France and due to the COVID-19 curfew I had to stop the work and leave the country.
In the current situation, most of the people show solidarity within the society they live, but we should not forget these people who don’t fit in, who don’t have the same opportunities.
How can they stay at home, if they don’t have one?
How can they wash their hands, if there is no water and no soap?
How can they keep physical distance, if there is not enough place for it?