United States July 2, 2019 6:30 pm Officials Confirm Fourth E. Coli Case Linked to Fair A six-year-old contracted E. coli after visiting the San Diego County Fair, making him the fourth confirmed case of the season. NBC 7’s Mark Mullen has more. US & World Videos 2:45 La Jolla Concours d'Elegance classic race cars 1:39 Troops Endure Hyper-Realistic Training 2:07 New study links consuming red meat with dementia 2:05 Police find, return dozens of abandoned Amazon packages 0:28 A Vermont state trooper plunges into icy pond to rescue 8-year-old girl