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• W4385915842 abstract "WHO declared the end of the Public Health Emergency of International Concern (PHEIC) for COVID-19 on May 5, 2023, and for mpox (formerly known as monkeypox) on May 11, 2023. Throughout its use, the meaning of the term PHEIC has been muddled. We call for a new, objective epidemic scale that better communicates the potential severity of an epidemic to member states and the public, and the necessity of activating proportional responses. As per the International Health Regulations of 2005, the formal PHEIC definition is “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”. Member states are required to report potential PHEICs if at least two of four criteria are satisfied (panel). These subjectively measured criteria reported by member states are then reviewed by a WHO Emergency Committee, which in turn subjectively decides whether to declare a PHEIC.1Mullen L Potter C Gostin LO Cicero A Nuzzo JB An analysis of international health regulations emergency committees and public health emergency of international concern designations.BMJ Glob Health. 2020; 5e002502Crossref Scopus (47) Google ScholarPanelCriteria used by WHO and member states when considering whether to declare or report a Public Health Emergency of International Concern•Is the public health impact of the event serious?•Is the event unusual or unexpected?•Is there a substantial risk for international spread?•Is there a substantial risk for international travel or trade restrictions? •Is the public health impact of the event serious?•Is the event unusual or unexpected?•Is there a substantial risk for international spread?•Is there a substantial risk for international travel or trade restrictions? The existing protocol for reporting and declaring a PHEIC has several well-recognised deficiencies.2Wilder-Smith A Osman S Public health emergencies of international concern: a historic overview.J Travel Med. 2020; 27taaa227Crossref Google Scholar Countries potentially endure repercussions upon reporting a potential PHEIC, primarily due to subsequent economic fallout such as travel and trade restrictions, thus discouraging reporting.3Cash RA Narasimhan V Impediments to global surveillance of infectious diseases: consequences of open reporting in a global economy.Bull World Health Organ. 2000; 78: 1358-1367PubMed Google Scholar Additionally, declaration of a PHEIC is politically contentious; this contention is in part because the members and deliberations of the Emergency Committee are not made public, and also because the Emergency Committee has applied the criteria for decision making inconsistently and obscurely.1Mullen L Potter C Gostin LO Cicero A Nuzzo JB An analysis of international health regulations emergency committees and public health emergency of international concern designations.BMJ Glob Health. 2020; 5e002502Crossref Scopus (47) Google Scholar Finally, the PHEIC only results in outbreaks being labelled as something to either ignore or panic over, rather than communicating tiered levels of risk requiring a proportional response. National governments and experts have criticised WHO for the timing of the PHEIC declaration for COVID-19 and other past pandemics, yet we contend that when a PHEIC is declared is less salient than what is declared within it.4Wilson K Brownstein JS Fidler DP Strengthening the international health regulations: lessons from the H1N1 pandemic.Health Policy Plan. 2010; 25: 505-509Crossref PubMed Scopus (0) Google Scholar, 5Fidler DP To declare or not to declare: the controversy over declaring a public health emergency of international concern for the Ebola outbreak in the Democratic Republic of the Congo.Asian J WTO Int Health Law Policy. 2019; 14: 287Google Scholar The PHEIC is a blunt instrument, presenting the world in binary terms—ie, if there is a PHEIC or not).6Pavone IR The COVID-19 pandemic, the failure of the binary PHEIC declaration system, and the need for reform.Verfassungsblog. 2021; (published online Nov 2.)https://doi.org/10.17176/20211102-173001-0Google Scholar However, modes of transmission differ by pathogen (eg, Ebola, severe acute respiratory syndrome) and require distinct responses across space (eg, national, regional, or global response) and time (aligned with the epidemic curve). The general public, and arguably local public health practitioners, who are unacquainted with the distinctions of a declared PHEIC, could greatly benefit from a scale that could communicate such subtleties. A tiered scale could serve as a more nuanced trigger for different types of response. Objective scales used by the hurricane and earthquake scientific communities serve as communication tools that deftly communicate such distinctions. For instance, the Saffir-Simpson scale categorises hurricanes into five categories using objective wind measurements, plus two additional categories of tropical storm and depression.7National Oceanic and Atmospheric AdministrationNational Hurricane CenterCentral Pacific Hurricane CenterSaffir-Simpson Hurricane Wind Scale.https://www.nhc.noaa.gov/aboutsshws.phpDate: 2023Date accessed: May 4, 2023Google Scholar Similarly, the Richter Scale uses objective measurements to classify earthquakes on a 1–9 scale, recognising the higher frequency of lower magnitude events.8Richter CF An instrumental earthquake magnitude scale.Bull Seismol Soc Am. 1935; 25: 1-32Crossref Google Scholar A hurricane's category can increase or decrease over time as more information is collected and can inform local preparedness plans. We argue that a scale using objective measurements fosters transparency, efficiently communicating to the public and to emergency organisations about levels of risk and proportional levels of response. We propose that WHO construct a novel epidemic scale that effectively conveys the potential severity of pathogenic outbreaks, with three crucial considerations. First, such a scale should consider the transmission mode, which in turn affects the reproductive rate, speed of transmission, and consequently potential international spread, as well as how these factors inform a timely, proportional response. The second consideration is that respiratory pathogens, whether airborne or droplet, and pathogens that spread asymptomatically, have an increased risk of spreading internationally. Finally, the uncertainty level about a disease, such as a suspected or confirmed mode of transmission, is also an important consideration. The new scale could further incorporate the terminology of variants of interest and variants of concern following the emergence of several variants of SARS-CoV-2. Designing such a scale is a challenging yet achievable task. Although tiered systems are imperfect,9Wenham C Kavanagh M Phelan A et al.Problems with traffic light approaches to public health emergencies of international concern.Lancet. 2021; 397: 1856-1858Summary Full Text Full Text PDF PubMed Scopus (0) Google Scholar cases from earthquakes and hurricanes offer relevant lessons. Field epidemiologists rely on clinical reports and case investigations to study local outbreak spread and the potential for respiratory and asymptomatic spread. The evidentiary standards used in field epidemiology should be clarified to underpin the new epidemic scale. WHO has an opportunity to pioneer this new epidemic scale, which can inform and serve as a much-needed trigger for activating different epidemic response financing instruments, as well as the declaration of national public health emergencies. If WHO cannot, then other nations can lead, just as the hurricane and earthquake scales were developed in the USA but adopted as global standards. We declare no competing interests" @default.
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• W4385915842 title "The when is less important than the what: an epidemic scale as an alternative to the WHO's Public Health Emergency of International Concern" @default.
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