Disease detectives with the US Centers for Disease Control and Prevention are investigating a cluster of rare and serious brain abscesses in kids in and around Las Vegas, Nevada, and doctors from other parts of the country say they may be seeing a rise in cases, too. In 2022, the number of brain abscesses in kids tripled in Nevada, rising from an average of four to five a year to 18. “In my 20 years’ experience, I’ve never seen anything like it,” said Dr. Taryn Bragg, an associate professor at the University of Utah who treated the cases. Pediatric neurosurgeons...