Public health emergency of international concern

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". Under the 2005 International Health Regulations (IHR), states have a legal duty to respond promptly to a PHEIC. The declaration is publicized by an IHR Emergency Committee (EC) of international experts, which was developed following the 2002–2004 SARS outbreak.

For other uses, see Public health emergency (disambiguation).

From 2005 to the present, there have been seven PHEIC declarations: the 2009–2010 H1N1 (or swine flu) pandemic, the ongoing 2014 polio declaration, the 2013–2016 outbreak of Ebola in Western Africa, the 2015–2016 Zika virus epidemic, the 2018–2020 Kivu Ebola epidemic, the 2020–2023 declaration for the COVID-19 pandemic, and the 2022–2023 mpox outbreak. The recommendations are temporary and require reviews every three months.

Automatically, SARS, smallpox, wild type poliomyelitis, and any new subtype of human influenza are considered as PHEICs and thus do not require an IHR decision to declare them as such. A PHEIC is not only confined to infectious diseases, and may cover an emergency caused by exposure to a chemical agent or radioactive material. It can be seen as an "alarm system", a "call to action", and "last resort" measure.

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