25,000 contact tracers started work on 28 May, making their contact calls to track down the 2,013 people who tested positive the previous day. They will be told to self-isolate under new test and trace schemes being launched in England and Scotland. Tracers will text, email or call people who test positive with coronavirus and ask who they had contact with. Any of those contacts deemed at risk of infection will be told to isolate for fourteen days, even if they are not sick. Those who have already had the virus will also be asked to self-isolate. The aim of the system is to lift blanket lockdown restrictions and move towards more localised, targeted measures. Contact is defined as spending 15 minutes or more at a two-metre distance; household members; or people with whom you have had face-to-face conversations less than one metre away.