My Fox LA:
State health officials say the number of whooping cough cases in California is now of epidemic proportions.
The California Department of Public Health said in a statement released Friday that more than 800 cases of pertussis have been reported over the past two weeks.
As of June 10, there have been 3,458 cases of whooping cough - more than in all of 2013.
The infection is cyclical and peaks every three to five years. In 2010, a whooping cough epidemic killed 10 infants in the state.