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
2009 Flu pandemic in North America be closed as a public health measure during the early outbreak. Most of the cases in California and Texas are not linked and may reflect localized outbreaks of this virus in those areas. As of April 30, the disease was not as virulent outside of Mexico as within Mexico, for reasons not fully understood. The United States of America declared a state of Public Health Emergency but this was said to be standard procedure in cases as divergent as the recent inauguration and flooding. According to The New York Times, "the emergency declaration frees resources to be used toward diagnosing