Covid-19: NHS Test and Trace made no difference to the pandemic, says report Post date 10 March 2021 ← Fiona Caldicott: president of the Royal College of Psychiatrists and the first national data guardian, whose legacy includes the Caldicott principles and Caldicott guardians → Risk of mortality in patients infected with SARS-CoV-2 variant of concern 202012/1: matched cohort study