Self-isolation is a form of social distancing for people who have symptoms of the coronavirus (COVID-19). People who have tested positive or have come into close contact with someone who has had a positive test for COVID-19 are required by law to self-isolate for 10 days or 14 days respectively when told to do so. This means staying at home and not having any contact with others outside of their household.
People returning from countries abroad may also be required to self-isolate for 14 days if the country they are travelling from is not on the list of exempt countries. This period of self-isolation is also sometimes called quarantine.
“Self-isolation” should be lower case and hyphenated.