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Philippines orders dengue vaccine probe

Reuters / Share:
airforcemedicine/Aaron Oelrich/CC0
airforcemedicine/Aaron Oelrich/CC0

MANILA (Reuters) – The Philippines ordered a probe yesterday into the immunisation of more than 730,000 children with a vaccine for dengue that has been suspended following an announcement by French drug company Sanofi that it could worsen the disease in some cases.

Amid mounting public concern, Sanofi explained its “new findings” at a news conference in Manila, but it did not say why action was not taken after a World Health Organisation (WHO) report in mid-2016 that identified the risk it was now flagging.

A non-governmental organisation said it had received information three children who were vaccinated with Dengvaxia had died and a senator said he was aware of two cases.

However, Department of Health Undersecretary Gerardo Bayugo said the three referred to by the NGO died due to causes not related to the vaccine, and Sanofi said no deaths had been reported as a result of the programme.

“As far as we know, as far as we are made aware, there are no reported deaths that are related to dengue vaccination,” said Ruby Dizon, medical director at Sanofi Pasteur Philippines.

Last week, the Philippines Department of Health halted the use of Dengvaxia after Sanofi said it must be strictly limited due to evidence it can worsen the disease in people not previously exposed to the infection. In a statement, Sanofi said the long-term safety evaluation of the vaccines showed significantly fewer hospitalisations due to dengue in vaccinated people over nine years old compared with those who had not been vaccinated.

Nearly 734,000 children aged nine and over in the Philippines have received one dose of the vaccine as part of a programme that cost 3.5 billion pesos ($69.54 million).

The Department of Justice yesterday ordered the National Bureau of Investigation to look into “the alleged danger to public health … and if evidence so warrants, to file appropriate charges thereon”.

There was no indication that Philippines health officials knew of any risks when they administered the vaccination.

However, the WHO said in a July 2016 research paper that “vaccination may be ineffective or may theoretically even increase the future risk of hospitalised or severe dengue illness in those who are seronegative at the time of first vaccination regardless
of age”.

Harry Roque, a spokesman for Philippines President Rodrigo Duterte, said on Sunday the government would hold to account those responsible for the programme.

Former Health Secretary Janette Garin, who implemented the programme under the administration of then-president Benigno Aquino, said she welcomed the investigation.

“In the event that there will be authorities who will point culpability to me, I am ready to face the consequences,” she told ANC TV. “We implemented it in accordance with WHO guidance and recommendations.”

Mr Roque said there had been no reported case of “severe dengue infection” since the vaccine was administered.

Volunteers Against Crime and Corruption, an NGO, said it was checking a report that three children on the island of Luzon had died since being vaccinated in April 2016, but the Department of Health said the deaths were not due to Dengvaxia.

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