More than 40 people in Los Angeles County and surrounding regions have been diagnosed with mumps, prompting public health officials Thursday to declare an outbreak and issue an alert to physicians and providers to be aware of it. In the
alert, public health officials

said many of the cases were initially misdiagnosed and there was a reliance of using false negative results. It’s unclear when this occurred. Health officials also did not release the conditions of those who were diagnosed. A response from Los Angeles County public health officials was not immediately forthcoming Thursday. READ MORE