In April 2020 we created the short online course, COVID-19 Critical Care: Understanding and Application, to meet the pressing needs of healthcare workers around the globe. Produced in just two weeks, the course was designed for frontline clinical staff caring for critically ill patients during the COVID-19 pandemic. 50,000 learners from all over the world have enrolled on the course: hear more about how it helped them refresh and upskill their knowledge on critical care.