There are striking parallels between the two syndromes – and scientists hope the link could help to unravel the mysteries of both. Midway through 2023, the neurologist Ioannis Mavroudis was working his way through the latest backlog of cases when he was struck by a revelation. As a concussion specialist who had spent many years in his post at Leeds Teaching Hospitals NHS Trust, Mavroudis had found himself dealing with a growing influx of patients with Long Covid – a loose assortment of health problems developed after an infection with Covid-19. (BBC News)