With new variants and a changing landscape of vaccination and immunity, what do the symptoms of covid-19—and our understanding of them—now look like? Mun-Keat Looi reports In the short space of a few years we’ve seen surprising changes in the way covid-19 presents. At the start of the pandemic the first commonly reported symptoms were loss of smell and taste, followed by shortness of breath and a cough, followed by vascular injuries, says David Strain, senior clinical lecturer at the University of Exeter Medical School. “That became the standard that we expected,” he says. Betty Rama...