A potentially fatal virus that causes fever, vomiting and severe watery diarrhea among small children is raging throughout Northern California, recent data shows. “It’s extremely contagious,” Dr.

A parent or caregiver needs to seek medical attention if the toddler’s diarrhea lasts more than 24 hours, is accompanied by a fever of 102°F (38°C) or higher, or there are signs of dehydration. While ...