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
Mumps outbreaks in the 21st century to low vaccination rates in Iowa's youth, coupled with the close quarters in dormitories, classrooms and cafeterias. According to Canadian media reports, there may be something novel about this mumps strain which indicates a standard MMR-series vaccination is not 95% effective, as was thought. 8 March 2017: Southeast Missouri State University has confirmed 29 cases of the mumps. The Louisiana Office of Public Health reported about 50 cases of mumps in the Dallas area. In 2014, there were 18,535 cases of mumps, while in 2015, there were 1143 cases. Mumps outbreaks in the 21st century Mumps outbreaks in the 21st