An Introduction to Learning Health Systems Prevalence of Point-of-Care Ultrasonography in NL Improved Appropriateness of Ferritin Testing Following Introduction of Reflex Testing in Eastern Health’s Laboratory Quality of Care in Long-Term Care Facilities by Region (2019) Carotid Artery Testing for Stroke Prevention at St Clare’s Vascular Laboratory (2018–2020) Persistence of Poor Thrombolysis Rates for Ischemic Stroke in NL The Impact of COVID-19 on the Incidence of Invasive Cancer and on Radiation Therapy in NL The Impact of COVID-19 on the Use of Oesophago-Gastro-Duodenoscopy in Eastern Health Guidelines for Medical Laboratory Testing The Extent of Digital Communication With Patients in NL During COVID-19 Pandemic