The death toll from a Legionnaires' disease outbreak at a western Illinois veterans home has climbed to seven, and the state's public health director has warned that more fatalities could occur. The Illinois Department of Veterans Affairs and the state Department of Public Health said Tuesday that the residents of the facility in Quincy who contracted Legionnaire's — a severe form of pneumonia — had underlying medical conditions and an average age of 86. "Unfortunately, we expect to see additional cases and possibly additional deaths because the incubation period for Legionnaires' disease can be up to two weeks," said Dr.