Lanarkshire on Sunday at her daily press briefing in Edinburgh on Monday. As a result, last week there were 1521 new Covid-19 cases in the region - the lowest weekly tally since the end of September.However, the "stubbornly high prevalence" of the virus in the region means level four restrictions could come into effect on Friday, November 20.The First Minister said she would confirm what restrictions would be in place from Friday at the Scottish Government's weekly review tomorrow.She added: "One of the issues we are looking at very closely is whether current restrictions are reducing Covid rates quickly enough in some areas."These areas have stable but still stubbornly high prevalence of the virus."Stubbornly high prevalence causes us.