UC Riverside School of Medicine Apr 20 2026 Measles remains one of the most contagious infectious diseases, spread through coughing and sneezing, with even small declines in vaccination coverage leading to outbreaks. As of 2026, California has reported its highest annual measles case count in seven years. In response to this growing concern, researchers have begun examining gaps in measles-related knowledge and vaccination coverage. A UC Riverside-led study has found critical gaps in knowledge,