“While the pandemic brought out the best in many people — including those who delivered food to elderly neighbors, sewed masks and risked their lives to care for afflicted patients — it also created opportunities for lawbreakers. Health care fraudsters took advantage of federal agencies’ and private insurers’ relaxed rules, which allowed patients to be treated without having to visit hospitals and clinics, said Tina Hernandez-Boussard, PhD, associate professor of biomedical informatics and of biomedical data science.”