New data shows cases of norovirus are rising in the U.S. According to the CDC, state health departments reported 91 cases during the week of Dec. 5, which is almost three times greater than the average weekly high of cases reported between 2021 and 2024. CBS News medical contributor Dr. Celine Gounder explains what to know.
WATCH: Search for answers continues in California wildfires
As firefighters gain the upper hand on the wildfires that savaged Southern California last week, the investigation into what caused the fires is intensifying.