MANILA, 29 January 2014 (IRIN) – Health officials are on alert to prevent the spread of infectious diseases in areas stricken by Typhoon Haiyan. “During this time of year, we can expect heavy rains and stagnant water from floods to become a cause for a possible increase in dengue cases,” said Dr Julie Hall, the UN World Health Organization (WHO) representative in the Philippines. In a by WHO and the Philippine Department of Health (DOH), there were 84 dengue cases reported between 1 and 18 January. The cases were registered in the city of Ormoc, in Leyte province in central Philippines, one of the areas worst hit by the category 5 typhoon, which killed more than 6,200 people….