A field researcher, wearing a full body protective outfit, prepares to enter the home of a covid-19 positive patient to collect a swab sample as part of a treatment trial by a co-operative of the Department of Health, the Catalan Health Institute, researchers from the Germans Trias Hospital and the Fight against AIDS Foundation, in Sant Antoni de Vilamajor, Spain, on Wednesday, March 26, 2020. Spain suffered its deadliest day this week since the outbreak of the coronavirus, with its fatalities surging past China's even as tight containment efforts across Europe paralyzed all walks of life. Photographer: Angel Garcia/Bloomberg via Getty Images