NHS Orkney has outlined the steps it is taking to implement the test and protect scheme for islanders.
The national strategy is being rolled out by health boards to manage the spread of Covid-19 and is now open to anyone in the community displaying symptoms.
Any confirmed cases will be assessed by NHS staff on Orkney to establish who they have been in close prolonged contact with.
Depending on the outcome, some contacts may be advised to isolate for 14 days.
Dr Louise Wilson, director of public health for NHS Orkney, said the move will help “break the chain of transmission”.
She added that people who are asked to isolate must not leave their home for a minimum of seven days or 14 days, depending on their circumstances.
Tests will take place either in the community assessment part of the health centre at the old Balfour Hospital site, or in GP surgeries for people living in the outer isles.
Testing has to be booked in advance and will only be provided to those people experiencing the symptoms.
Tests can be arranged by calling 01856 888 211.
NHS Orkney has also urged locals to prepare a plan in case they are asked to isolate, including identifying people who could shop for groceries or collect prescriptions.
Additional support for those who may struggle to isolate is available on 0800 111 4000.