To help reduce the spread of coronavirus (COVID-19), there are three main reasons why you may be asked to self-isolate:
if you have developed coronavirus symptoms
if you have been tested positive for coronavirus
if you are over 18 unvaccinated and have been in ‘close contact’ with someone who has tested positive for coronavirus.
In some cases you may need to continue to self-isolate even if you have received a negative test result.
If you have been advised by contact tracers to continue self-isolating. Read more about what do if the advice given by the app is different from that given by NHS Test and Trace or NHS Wales Test, Trace, Protect.
If you are over the age of 18 and have not been fully vaccinated and have been in close contact with someone who has tested positive with coronavirus, you will need to self-isolate for 10 full days after that contact. Even if you test negative for the virus within this period, you need to complete 10 full days of self-isolation. This is because the incubation period of the virus means you could still develop coronavirus after receiving a negative test result, within 10 days of the contact. It is important to remember that as many as 1 in 3 people with coronavirus have no symptoms. If you have been in close contact with someone who has tested positive with coronavirus and you have been fully vaccinated or are under the age of 18 and it has been two weeks since your final dose of an MHRA-approved vaccine in the UK vaccination programme, you will not need to self-isolate.