A BMJ investigation has raised concerns that the VAERS system isn’t operating as intended and that signals are being missed. Jennifer Block reports Three weeks after receiving a second dose of a covid vaccine, Robert Sullivan collapsed at home on his treadmill. An anaesthesiologist in Maryland, USA, he was a particularly fit 49 year old: the week before falling ill, he’d been happily skiing at altitude in Colorado. Sullivan was given a diagnosis of sudden onset pulmonary hypertension, whi...