US$4 million will be needed to fight dengue fever over the course of 2010, Ministry of Health officials said during a workshop in the capital on Wednesday. However, Eng Huot, a secretary of state at the ministry, said the measures taken to tackle the disease in 2009 proved successful. “This year, dengue fever mortality dropped 50 percent from last year. Thirty-six children among 11,625 who are suffering from this infectious disease died in 2009,” he said.