At least five people have died and 28 others have fallen ill in a mysterious disease outbreak in Burundi, the World Health Organization (WHO) has said. The outbreak is centred on the Mpanda district in Burundi’s north, near to the border with the Democratic Republic of Congo. Symptoms of the unidentified disease include fever, vomiting, diarrhoea, and blood in urine, with jaundice and anaemia reported in some severe cases, the WHO said in a statement that was published on Thursday before being taken down without explanation. The WHO and the local health authorities are racing to identify the disease. Initial testing ruled out Ebola and Marburg, two haemorrhagic fevers with extremely high mortality rates that have caused outbreaks in the region in the past. Investigators are now testing for a range of pathogens including Rift Valley fever, dengue, yellow fever, Crimean-Congo haemorrhagic fever and leptospirosis, the WHO said.…