California is in the midst of a pertussis, or whooping cough, epidemic—and Marin County has the third-highest rate among the state’s 58 counties, according to recent data from the California Department of Public Health. (Sonoma and Napa have the highest and second highest rate, respectively.)
So far this year, Marin’s 135 cases have set the county’s rate at 52.76 cases per 100,000 people, almost six times as high as the state’s overall rate. Two infant…