Yesterday Scotland's First Minster Nichola Sturgeon published the outline of a new public health measure, called "Test, Trace, Isolate, Support".
It's billed as one of a range of public health measures to be used to ensure low levels of community transmission of Covid-19.
It is, in essence, the well tried and tested virus hunting approach, in which public health tracing teams, already existing in local authorities and health districts, would be bulked up with extra staff, and set about following the established playbook for contact tracing to fin people infected with the virus and others who might have come into contact with them - and quarantine them.