Public health officials in Washington County, Oregon, are investigating a cluster of Legionnaires’ disease cases that has left four people hospitalized. In total, there are six confirmed cases of Legionnaires’ disease in the county. Washington County has seen fourteen cases so far this year, and public health officials are speculating that the county may exceed its record number of nineteen cases in 2019. The Washington County Public Health Department, along with the Oregon Health Authority and Centers for Disease Control and Prevention, are collecting samples and performing testing of potential sources of the outbreak. Public health officials are encouraging residents…