A recent study led by the University of California, San Francisco (UCSF) has shed new light on the causes of a peculiar outbreak of acute severe hepatitis that surfaced in otherwise healthy children after Covid-19 lockdowns eased in the United States and 34 other countries in the spring of 2022. With around 1,000 cases reported so far, 50 children have needed liver transplants and at least 22 have died, making this mysterious outbreak highly alarming to healthcare professionals. The scientists found that the disease was linked to...