Legionnaires' disease showed that Legionnaires' disease was responsible and the immediate epidemiological investigation traced the source of the infection to the air-conditioning cooling tower on the roof of Stafford District Hospital. In March 1999, a large outbreak in the Netherlands occurred during the Westfriese Flora flower exhibition in Bovenkarspel; 318 people became ill and at least 32 people died. This was the second-deadliest outbreak since the 1976 outbreak and possibly the deadliest, as several people were buried before Legionnaires' disease had been diagnosed. The world's largest outbreak of Legionnaires' disease happened in July 2001 with people appearing at the hospital on July
2017 Democratic Republic of the Congo Ebola virus outbreak is attempting to obtain and review Rwanda's public health rationale and relevant scientific information for implementing these measures. The sub-type "Zaire ebolavirus" has been confirmed in the current outbreak, from the family Filoviridae. It is a single stranded RNA virus, with a 60-90 percent mortality rate (the highest among the strains). An unusually high mortality has been reported in the local pig population. An investigation into potential causes is being considered. Multiple documented outbreaks of Ebola virus disease have occurred in the DRC, with the first being the 1976 outbreak. The virus took its name from the Ebola River near