If one person in the household gets the covid coronavirus, does he have to move out, or would everybody else have to move out?

COVID-19 prevention: Very difficult problem. By the time of first symptoms, s/he might have already spread it to other household members. But might still be important if another household member is elderly or has a serious health problem. But where to go without exposing others? In some high risk communities, public quarantine sites might become available. Otherwise, most families can't afford hotel for 2 weeks.

COVID-19 : Yes, COVID-19 is highly contagious. The person who is tested positive for coronavirus should be isolated. Other peoples who have close contact with the virus-infected patient should quarantined and tested. Incubation time ranges from 2-14 days, with most in about 11 days.