Global emergency call on yellow fever outbreak
The World Health Organisation has been urged to take emergency action over a rapidly spreading yellow fever epidemic that has so far infected more than 2000 people in Africa and Asia.
Health experts at Georgetown University’s Institute for National and Global Health Law, writing in the Journal of the American Medical Association, have warned that “quick and effective action” is needed to halt the spread of the disease, which has already killed more than 250 people in Angola and has appeared in Congo, Kenya and China.
The experts, Dr Daniel Lucey and Professor Lawrence Gostin, said that shortages in the supply of the yellow fever vaccine raised the risk of a “health security crisis” if the disease spreads through Africa and reaches Asia (which has never experienced a yellow fever epidemic) or the Americas (where the mosquito that can transmit yellow fever is endemic).
“The WHO should urgently convene an emergency committee to mobilise funds, coordinate an international response, and spearhead a surge in vaccine production,” they said.
Dr Lucey and Professor Gostin said delays in the international community’s response to the 2014 Ebola outbreak that eventually infected 28,646 people and claimed 11,323 lives should serve as a salutary lesson of the costs of a tardy response.
“Prior delays by the WHO in convening emergency committees for the Ebola virus, and possibly the ongoing Zika epidemic, cost lives and should not be repeated,” they said. “Acting proactively to address the evolving yellow fever epidemic is imperative.”
Yellow fever kills around 30,000 people a year, mostly in Africa, and the latest outbreak has added impetus to mass vaccination programs. More than 7 million Angolans have been immunised against yellow fever, and in May the Democratic Republic of Congo Government announced plans to vaccinate 2 million of its citizens.
Dr Lucey and Professor Gostin warned that these mass immunisation campaigns “could be a tipping point in exhausting global vaccine supplies”.
Medical experts have already advised that just one-fifth of normal vaccine dose be administered to avert the risk of an acute shortage if the disease spreads, but Dr Lucey and Professor Gostin said it was time for the WHO to step in.
They said the world health body should invoke procedures similar to those used during the Ebola epidemic to safeguard vaccine supplies.
“Stewardship of scarce vaccine supplies is essential, but requires the WHO’s Director-General to declare a public health emergency of international concern,” they wrote. “[But] it is only by convening an emergency committee that the Director-General could declare a public health emergency of international concern.
“Given the world’s vital health security interest, the WHO’s Director-General should use [the procedures] to authorise a reduced vaccine dose to control the epidemic in Angola.”
Dr Lucey and Professor Gostin said the yellow fever outbreak, combined with the experiences of the Ebola and Zika epidemics, showed that the WHO needed to have a standing emergency meeting that met regularly, rather than having to be formed each time a serious global health threat arose.
“The complexities and apparent increased frequency of emerging infectious disease threats, and the catastrophic consequences of delays in the international response, make it no longer tenable to place the sole responsibility and authority with the WHO’s Director-General to convene currently ad hoc emergency committees,” they said.