The World Health Organization said on Monday it hoped to conduct a full review by the end of the year of a dengue vaccine that was suspended last week in the Philippines. On Friday, the department of health halted its dengue immunization program after the manufacturer, French drug company Sanofi Pasteur, announced the vaccine, [commonly known as Dengvaxia], must be strictly limited due to evidence it can worsen dengue in people not previously exposed to the infection. The government of Brazil, where dengue is common, confirmed it already had recommended restricted use of the vaccine. Amid mounting public concern, Sanofi explained its new findings" at a news conference in Manila on Monday but did not say why action was not taken after a WHO report in mid-2016 that identified the risk the company was now flagging. Nearly 734,000 children ... in the Philippines have received one dose of the vaccine as part of a programme that cost 3.5 billion pesos (more than $80 million Cdn). The Philippines Department of Justice on Monday ordered the National Bureau of Investigation to look into "the alleged danger to public health ... and if evidence so warrants, to file appropriate charges." There was no indication that Philippines health officials knew of any risks. However, the WHO said in a July 2016 research paper that "vaccination may be ineffective or may theoretically even increase the future risk" of severe dengue illness in people who hadn't been exposed to it prior to their first vaccination.