A public health emergency of international concern (PHEIC/feɪk/FAYK) is a formal declaration by the World Health Organization (WHO) of "an extraordinary event which is determined to constitute a public health risk to other States through the international spread of disease and to potentially require a coordinated international response", formulated when a situation arises that is "serious, sudden, unusual, or unexpected", which "carries implications for public health beyond the affected state's national border" and "may require immediate international action".[1] Under the 2005 International Health Regulations (IHR), states have a legal duty to respond promptly to a PHEIC.[2] The declaration is publicized by an IHR Emergency Committee (EC) of international experts,[3] which was developed following the 2002–2004 SARS outbreak.[4]
Automatically, SARS, smallpox, wild typepoliomyelitis, and any new subtype of human influenza are considered as PHEICs and thus do not require an IHR decision to declare them as such.[10] A PHEIC is not only confined to infectious diseases, and may cover an emergency caused by exposure to a chemical agent or radioactive material.[11][12] It can be seen as an "alarm system", a "call to action", and "last resort" measure.[13][14]
^Mark A. Hall; David Orentlicher; Mary Anne Bobinski; Nicholas Bagley; I. Glenn Cohen (2018). "8. Public Health Law". Health Care Law and Ethics (9th ed.). New York: Wolters Kluwer. p. 908. ISBN978-1-4548-8180-3.