If you, or anyone in your household, have a new persist dry cough or a temperature of 37.8 or more, you must all self-isolate for 14 days. (note, that these rules change so please refer to most recent guidance)
Any patient who is immunocompromised (undergoing chemotherapy, suppress immune system and so on), should self-isolate fully for 12 weeks to reduce your exposure to the virus totally.
All those who are pregnant, over 70 or have underlying health conditions should limit social contact. At the moment, this does not mean total isolation but taking care to reduce exposure to other people where possible. For example avoiding crowds, restaurants, cinema’s etc.
Information on self isolation is below: