Global Response to Emerging and Re-Emerging Diseases Sylvain Aldighieri, MD International Health Regulations – Epidemic Alert & Response PAHO/WHO Objective To analyze global health issues related to EIDs …with a special focus on the role of nurses in detection. Plan of the Presentation • • • • • Emerging and re-emerging infections: definitions Examples of EIDs International Health Regulations IHR(2005) Role of Nurses in EID detection and response Conclusions Epidemics and Pandemics have shaped our history… 1st Millenium Middle Ages 20th Century …and they continue to threaten us …and place sudden intense demands on national and international health systems …on some occasions have brought health and social systems to the point of collapse …the diseases of most concern are those that may have international significance – either as a possible global epidemic or pandemic, or because they pose a risk for travellers with high case fatality rates or have trade implications. Most of these diseases tend to be emerging diseases. So, in the context of emerging/epidemic disease at the beginning of the 21st. Century: • We have seen the emergence of new or newly recognized pathogens (e.g. Highly Pathogenic Avian Influenza [H5N1], SARS, Nipah, pandemic influenza [H1N1], novel coronavirus ……) • The resurgence of well characterized outbreakprone diseases (e.g. dengue, measles, yellow fever, chickungunya - also cholera, TB, meningitis, shigellosis) • Human-made "bio-risk" also increasing: accidental and deliberate release of infectious agents as smallpox, SARS, Ebola, anthrax, tularaemia, etc. Emerging diseases: a definition • New diseases which have not been recognized previously; • Known diseases which are increasing, or threaten to increase, in incidence or in geographic distribution; • The terms “re-emerging” or “resurgent diseases” are also used – usually to describe diseases which we had thought had been controlled or conquered through immunization, antibiotic use or environmental changes, but which are now reappearing. Map of geographic origins of EID events, 1940-2004 (Jones et al, Nature 2008) Substantiated public health events of potential international concern by hazard Jan 2001-14 June 2011 (n=2,448; 477 (19%) in AMRO) 85% Modeling EID events: Relative risk of an EID Hot Spots: global distribution of relative risk of an EID event caused by zoonotic pathogens from wildlife, (Jones et al, Nature, 2008). 61% of all Emerging Infectious Diseases are Zoonoses affecting Humans Translocation Encroachment Introduction “Spill over” & “Spill back” Agricultural Intensification Human encroachment Ex situ contact Ecological manipulation Wildlife Domestic Animal Technology And Industry Human Global travel Urbanization Biomedical manipulation • Frequency of all EID events has significantly increased since 1940, reaching a peak in 1980-1990 • 61% of EID events are caused by the transmission from animals (zoonoses) • 74% of these from wildlife • Zoonotic EIDs from wildlife reach highest proportion in recent decade Purpose and scope of the IHR “to prevent, protect against, control and provide a public health response to the international spread of disease in ways that are commensurate with and restricted to public health risks, and which avoid unnecessary interference with international traffic and trade“ (Article 2) • • • From three diseases to all public health hazards, irrespective of origin or source From control of borders to containment at source From preset measures to adapted response WHO global alert and response systems Formal reports States Parties Disseminate information Verification WHO Event’s Risk assessment Initial screening Assist Respond Others sources Informal/ Unofficial information` Early warning function of the public health surveillance system 100% coverage, 100% sensitivity, 100% flexibility Indicator-based surveillance (discrete variables) - Case based (aggregated, individual) - Laboratory results - Environmental measurements - Drug sales - Absenteeism - Etc. Complementary Event-based surveillance (unstructured information) - Media reports - Hotlines (community, professionals, etc.) - NGOs - Diplomatic channels - Military channels - Etc. Signal Unusual health event Risk Triangulation Verification Assessment of sources Response Outbreak Detection and Response without Preparedness First Case Late Detection Delayed Response 90 80 70 60 Opportunity for control 50 40 30 20 10 Day 39 37 35 33 31 29 27 25 23 21 19 17 15 13 11 9 7 5 3 0 1 Cases Outbreak Detection and Response with Preparedness Early Detection Rapid Response 90 80 70 Potential Cases Prevented 60 50 40 30 20 10 Day 39 37 35 33 31 29 27 25 23 21 19 17 15 13 11 9 7 5 3 0 1 Cases Information sharing at WHO States WHO Portal Operations Event Management System EURO PAHO EMRO SEARO AFRO WPRO • No single institution has all the capacity! • Coordinate and support rapid international team deployment to countries for outbreak response • To focus and coordinate global resources - local > regional > global SARS Coronavirus (SARS CoV) • SARS CoV identified on 27 March 2003 • Highly mutable • Reservoir unknown • 8,098 cases with 774 deaths (CFR% 9.5, age related) • 1,707 HCWs affected (21%) • 27 countries affected with 92% of cases in mainland China, Hong Kong SAR, and Taiwan, China • Age range – 0-97 years; most cases 30-45 years • Almost exceeded surge capacity of acute care facilities and public health services SARS…a first (and a wake up) call • First epidemic of the 21st century • Social, political and economic impact, including psychosocial impact • Estimated economic cost of $US30 billion (Stanley Morgan); $US100 billion (Nature); $US48 billion in China alone (Chinese Center for Economic Research) • First new pathogen identified in the 21st century and fast discovery (3 weeks after Global Alert) • First time EVER that a global surveillance system was implemented in response to an unknown public health emergency Continued Challenges Human-Animal Interface Animal Surveillance Human Surveillance Create bridges Joint assessment Exchange data and findings H5N1 Avian Influenza December 2003 – August 2012 • 608 cases • including 359 deaths • in 15 countries PAHO Media Surveillance Concentration of ARD cases detected in hospital in Oaxaca, Mexico. PAHO Media Surveillance ARD outbreak detected in La Gloria, Veracruz, Mexico. PAHO/WHO Event Management USA via NFP notified first confirmed cases of Influenza A H1N1 in California. PAHO IHR informed Mexico via NFP about first cases of A H1N1 in California, USA. MEXICO via NFP Notification of outbreaks in different states without laboratory diagnosis and confirmed ILI in Mexicali, Baja California. PAHO IHR requested more information from Mexico via NFP about outbreaks in different states. PAHO IHR requested verification from Mexico via NFP about ARD situation in La Gloria, Vera Cruz. Teleconference between PAHO IHR and Mexico NFP for joint Risk Assessment. PAHO EOC activated. Teleconference between USA, Mexico, Canada and PAHO about investigation in USA. USA via NFP cases confirmed in TX. CANADA Laboratory confirmation of first Influenza A H1N1 cases in samples from Mexico. MEXICO via NFP confirmed presence of outbreak of etiology under investigation in La Gloria, Vera Cruz. PAHO sent Response Team to Mexico GOARN. PAHO IHR requested verification from Mexico via NFP about ARD in Oaxaca. Teleconference between Canada, Mexico and USA on ILI in students returning from Mexico. USA via NFP Cases confirmed in KS. MEXICO via NFP rules out outbreak in Oaxaca. DG WHO following Emergency Committee declares PHEIC. USA via NFP Cases confirmed in NY and OH. PAHO IHR requested verification from Mexico via NFP about ILI in Mexicali, Baja California. WHO Declares PHASE 4 CANADA via NFP First cases confirmed. WHO Declares PHASE 5 10 April 11 April 12 April 13 April 14 April 15 April 16 April ARD (Acute Respiratory Disease) ILI (Influenza-like Illness) 17 April 18 April 19 April 20 April 21 April 22 April PHEIC (Public Health Emergency International Concern) 23 April 24 April 25 April 26 April 27 April 28 April 29 April Mexico 2009. Pandemic Epidemic Curves. Source: Mexican Ministry of health – INDRE. Retrospective. Confirmed cases 2009 Deaths 2010 Nurses are uniquely positioned to identify events of potential public health significance…… • Any outbreak of disease • Any uncommon illness of potential public health significance • Any infectious or infectious-like syndrome considered unusual by HCWs, based on: • Frequency e.g., a sudden, unexplained, significant increase in the number of patients, especially when it occurs outside the normal season • Circumstances of occurrence e.g., many patients coming from the same location or participating in similar activities • Clinical presentation e.g., a patient’s health rapidly deteriorating out of proportion to the presenting symptoms and diagnosis • Severity e.g., a number of patients failing to respond to treatments “Astute” questions during Patient triage (Credit: Gail Thomson, NMGH, UK) •Thorough travel history •History of fever within 21/7 of travel to an at-risk country, check temperature •Fever and bleeding/bruising after a tick bite from an atrisk area or after killing livestock/abattoir work •Exposure history •Clinical history & vital signs •Airline flight numbers and stop over/transit documented. •Illness during the journey. •Illness during any stopover/s •Malaria test Nurses and Infection Control - HCWs may be the canaries! - 21 % of the SARS probable cases were HCWs ! - Pneumonic Plague, Peru 2010 They may be the first cluster of cases that triggers an alarm bell that there is something seriously wrong. Nurses and EID detection “In remaining vigilant for the presence of a new disease, the individual nurse functions as a mini-surveillance system.” Hope for the best…and prepare for the worst. Thank you