Public Health Emergency of International Concern second PHEIC was issued in May 2014 with the resurgence of polio after its near-eradication, deemed "an extraordinary event." On Friday, August 8, 2014, the World Health Organization declared its third Public Health Emergency of International Concern in response to the outbreak of Ebola in Western Africa. On Monday, February 1, 2016, the World Health Organization declared its fourth PHEIC in response to clusters of microcephaly and Guillain–Barré syndrome in the Americas, which at the time were suspected to be associated with the ongoing outbreak of Zika virus. Later research and evidence bore out these concerns; in April, the WHO
Social history of viruses country until 1953. In the 1980s, outbreaks in Tanzania and Kenya were controlled by the use of 26 million doses of vaccine, and a recurrence of the disease in 1997 was suppressed by an intensive vaccination campaign. By the end of the century rinderpest had been eradicated from most countries. A few pockets of infection remained in Ethiopia and Sudan, and in 1994 the Global Rinderpest Eradication Programme was launched by the Food and Agriculture Organization (FAO) with the aim of global eradication by 2010. In May 2011, the FAO and the World Organisation for Animal Health announced that "rinderpest