So we've just implemented protocol in Newcastle.Every Covid-19+positive inpatient gets 25,OHD checked.If <15 nmol/L, STAT oral 300,000 iU of D3, followed by 1,600 iU daily maintenance.If 15 - 25 nmol/L, STAT 200,000 iU, followed by 800 iU daily maintenance.If 25 - 40 nmol/L, STAT 100,000 iU, followed by 800 iU daily maintenance.If 40 - 50 nmol/L, just 800 iU daily maintenance.Everybody above that just gets standard UK  recommended 400 iU daily maintenance as per PHE and SACN.Virtually all ventilated and CPAP patients so far are < 20 nmol/L