Presentation on theme: "Communicable Diseases and Human Security Kelechi Ohiri MD MPH MS Health, Nutrition, Population Human Development Network World Bank."— Presentation transcript:
Communicable Diseases and Human Security Kelechi Ohiri MD MPH MS Health, Nutrition, Population Human Development Network World Bank
Outline of Presentation Part 1 – Overview of Communicable Diseases (CDs) Introduction and Definition Importance of CDs Selected CDs of Public Health Concern Part 2- Mounting a Global Response Approaches to intervention Key elements of a global response World Banks role and involvement
Human Security in a globalized world The changing role of policy makers in an increasingly globalized world Shared space = Shared Destiny Local actions have global consequences Global interventions can achieve positive local impact As long as human interactions exist, Communicable diseases will remain an issue.
Communicable Diseases: Definition Defined as any condition which is transmitted directly or indirectly to a person from an infected person or animal through the agency of an intermediate animal, host, or vector, or through the inanimate environment. Transmission is facilitated by the following (IOM) more frequent human contact due to Increase in the volume and means of transportation (affordable international air travel), globalization (increased trade and contact) Microbial adaptation and change Breakdown of public health capacity at various levels Change in human demographics and behavior Economic development and land use patterns
CD- Modes of transmission Direct Blood-borne or sexual – HIV, Hepatitis B,C Inhalation – Tuberculosis, influenza, anthrax Food-borne – E.coli, Salmonella, Contaminated water- Cholera, rotavirus, Hepatitis A Indirect Vector-borne- malaria, onchocerciasis, trypanosomiasis Formites Zoonotic diseases – animal handling and feeding practices (Mad cow disease, Avian Influenza)
Importance of Communicable Diseases Significant burden of disease especially in low and middle income countries Social impact Economic impact Potential for rapid spread Human security concerns Intentional use
Communicable Diseases account for a significant global disease burden In 2005, CDs accounted for about 30% of the global BoD and 60% of the BoD in Africa. CDs typically affect LIC and MICs disproportionately. Account for 40% of the disease burden in low and middle income countries Most communicable diseases are preventable or treatable.
Communicable Disease Burden Varies Widely Among Continents
Communicable disease burden in Europe
Causes of Death Vary Greatly by Country Income Level
CDs have a significant social impact Disruption of family and social networks Child-headed households, social exclusion Widespread stigma and discrimination TB, HIV/AIDS, Leprosy Discrimination in employment, schools, migration policies Orphans and vulnerable children Loss of primary care givers Susceptibility to exploitation and trafficking Interventions such as quarantine measures may aggravate the social disruption
CDs have a significant economic impact in affected countries At the macro level Reduction in revenue for the country (e.g. tourism) Estimated cost of SARS epidemic to Asian countries: $20 billion (2003) or $2 million per case. Drop in international travel to affected countries by 50-70% Malaria causes an average loss of 1.3% annual GDP in countries with intense transmission The plague outbreak in India cost the economy over $1 billion from travel restrictions and embargoes At the household level Poorer households are disproportionately affected Substantial loss in productivity and income for the infirmed and caregiver Catastrophic costs of treating illness
International boundaries are disappearing Borders are not very effective at stopping communicable diseases. With increasing globalization interdependence of countries – more trade and human/animal interactions The rise in international traffic and commerce makes challenges even more daunting Other global issues affect or are affected by communicable diseases. climate change migration Change in biodiversity
Human Security concerns Potential magnitude and rapid spread of outbreaks/pandemics. e.g. SARS outbreak No country or region can contain a full blown outbreak of Avian influenza Bioterrorism and intentional outbreaks Anthrax, Small pox New and re-emerging diseases Ebola, TB (MDR-TB and XDR-TB), HPAI, Rift valley fever.
Select Communicable Diseases
Tuberculosis 2 billion people infected with microbes that cause TB. Not everyone develops active disease A person is infected every second globally 22 countries account for 80% of TB cases. >50% cases in Asia, 28% in Africa (which also has the highest per capita prevalence) In 2005, there were 8.8 million new TB cases; 1.6 million deaths from TB (about 4400 a day) Highly stigmatizing disease
Tuberculosis and HIV A third of those living with HIV are co-infected with TB About 200,000 people with HIV die annually from TB. Most common opportunistic infection in Africa 70% of TB patients are co-infected with HIV in some countries in Africa Impact of HIV on TB TB is harder to diagnose in HIV-positive people. TB progresses faster in HIV-infected people. TB in HIV-positive people is almost certain to be fatal if undiagnosed or left untreated. TB occurs earlier in the course of HIV infection than many other opportunistic infections.
Global Prevalence of TB cases (WHO)
Tuberculosis Control Challenges for tuberculosis control MDR-TB - In most countries. About new cases annually. XDR-TB cases confirmed in South Africa. Weak health systems TB and HIV The Global Plan to Stop TB an investment of US$ 56 billion, a three-fold increase from The estimated funding gap is US$ 31 billion. Six step strategy: Expanding DOTS treatment; Health Systems Strengthening; Engaging all care providers; Empowering patients and communities; Addressing MDR TB, Supporting research
Malaria Every year, 500 million people become severely ill with malaria causes 30% of Low birth weight in newborns Globally. >1 million people die of malaria every year. One child dies from it every 30 seconds 40% of the worlds population is at risk of malaria. Most cases and deaths occur in SSA. Malaria is the 9 th leading cause of death in LICs and MICs 11% of childhood deaths worldwide attributable to malaria SSA children account for 82% of malaria deaths worldwide
Annual Reported Malaria Cases by Country (WHO 2003)
Global malaria prevalence
Malaria Control Malaria control Early diagnosis and prompt treatment to cure patients and reduce parasite reservoir Vector control: Indoor residual spraying Long lasting Insecticide treated bed nets Intermittent preventive treatment of pregnant women Challenges in malaria control Widespread resistance to conventional anti-malaria drugs Malaria and HIV Health Systems Constraints Access to services Coverage of prevention interventions
HIV/AIDS In 2005, 38.6 million people worldwide were living with HIV, of which 24.7 million (two- thirds) lived in SSA 4.1 million people worldwide became newly infected 2.8 million people lost their lives to AIDS New infections occur predominantly among the age group. Previously unknown about 25 years ago. Has affected over 60 million people so far.
HIV Co-infections Impact of TB on HIV TB considerably shortens the survival of people with HIV/AIDS. TB kills up to half of all AIDS patients worldwide. TB bacteria accelerate the progress of AIDS infection in the patient HIV and Malaria Diseases of poverty HIV infected adults are at risk of developing severe malaria Acute malaria episodes temporarily increase HIV viral load Adults with low CD4 count more susceptible to treatment failure
Global HIV Burden
HIV/AIDS Interventions depend on Epidemiology – mode of transmission, age group Stage of epidemic –concentrated vs. generalized Elements of an effective intervention Strong political support and enabling environment. Linking prevention to care and access to care and treatment Integrate it into poverty reduction and address gender inequality Effective monitoring and evaluation Strengthening the health system and Multisectoral approaches Challenges in prevention and scaling up treatment globally include Constraints to access to care and treatment Stigma and discrimination Inadequate prevention measures. Co-infections (TB, Malaria)
Avian Influenza Seasonal influenza causes severe illness in 3-5 million people and – deaths yearly 1 st H5N1 avian influenza case in Hong Kong in By October 2007 – 331 human cases, 202 deaths.
Avian Influenza Control depends on the phase of the epidemic Pre-Pandemic Phase Reduce opportunity for human infection Strengthen early warning system Emergence of Pandemic virus Contain and/or delay the spread at source Pandemic Declared Reduce mortality, morbidity and social disruption Conduct research to guide response measures Antiviral medications – Oseltamivir, Amantadine Vaccine – still experimental under development. Can only be produced in significant quantity after an outbreak
Confirmed human cases of HPAI
Migratory pathway for birds and Avian influenza
Neglected diseases Cause over 500,000 deaths and 57 million DALYs annually. Include the following Helminthic infections Hookworm (Ascaris, trichuris), lymphatic filariasis, onchocerciasis, schistosomiasis, dracunculiasis Protozoan infections Leishmaniasis, African trypanosomiasis, Chagas disease Bacterial infections Leprosy, trachoma, buruli ulcer
Communicable Disease and Human Security Part 2 - Mounting an Effective Global Response
Approaches to Interventions Personal Responsibility and action Utilitarian Approaches – Greatest good for the greatest number Including non Health Systems Interventions. Regulations and Laws Partnerships and Collaboration Enlightened Self Interest
Personal Responsibility and action Improved hygiene and sanitation Hand washing, proper waste disposal, food preparation and handling. Information, education and behavior change Changing harmful household practices Livestock handling, knowledge about contagion Cultural and social norms Self reporting of illnesses and compliance with interventions and treatment.
Utilitarian Approaches – Greatest good for the greatest number Reliance on personal responsibility not always the optimal option given different knowledge levels and values. Public good nature of the interventions Social Isolation and Quarantine measures Home treatment; Isolation Mass vaccination programs and campaigns Polio, small pox, DPT, Hepatitis, Yellow fever Mass treatment programs – Onchocerciasis, de-worming programs. For some CDs, intervention in other sectors is required Environmental health – elimination of breeding sites, spraying Agricultural practices such as poultry handling and exposure to soil pathogens during farming.
Regulations and Laws National response remains the bedrock of intervention National laws and capacities vary. International Regulations and laws introduced 1851 – International Sanitary regulations in Europe following cholera outbreak international sanitary regulation by WHO Replaced by the International Health regulation Minor changes in 1973 and 1981 cholera, plague, yellow fever, smallpox, relapsing fever and typhus 2005 – Revised International Health Regulation Challenge of enforceability of international agreements.
Regulation and laws – WHO 2005 International health regulation IHR (2005) is a legally binding agreement among member states of WHO to cooperate on a set of defined areas of public health importance. Arrived at by consensus of all member countries of WHO, with clear arbitration mechanisms Its elements include Notification: National IHR Focal Points and WHO IHR Contact Points Requirements for national core capacities Recommended measures External advice regarding the IHR (2005)
Partnerships and Collaboration Collaboration vs. coercion Importance of partnerships – MDG 8: Develop global partnerships for development Comparative advantage of partners Inclusiveness Examples of partnerships Over 70 Global health partnerships available Examples include the Stop-TB program, GFATM, RBM, UNAIDS, GAVI, Global Outbreak Alert and Response Network, GAIN, bilateral and multilateral organizations.
A paradigm shift - Enlightened Self interest Communicable diseases have no borders. Predominantly affect the poor, and poor countries Also affect richer households and countries. Interventions are non-rival, non-exclusive and have positive externalities. Elimination and control of certain communicable diseases increases global health security. Limited financial incentives for the market to drive needed innovation in research and drug development Mismatch between global health need and health spending Global health security is therefore inextricably tied to the effective control of CDs in developing world.
Global Mismatch Between Disease Burden and Health Spending
Future Population Growth Will be in LICs and MICs
Key principles of an Effective Global Response Respect for the value of each life Behind every statistic is an individual Understanding of the social context that govern individual decision making Disease Surveillance and reporting Management and containment of outbreaks Strong legal and regulatory framework Sustained and predictable financing Building national health systems
World Banks involvement Relevance to our mandate CDs disproportionately affect the poor and LICs and MICs Enormous economic consequences Major constraint to achieving the MDGs Major source of financing for poor countries This position is rapidly changing with the entrance of newer players in DAH such as Gates foundation, Bilaterals, multilaterals. Call for innovative financing schemes
World Bank $430 million committed to malaria booster projects in Africa By 2008, 21 million bed nets and 42 million ACT doses would have been distributed. As of June 2007, the World Bank had approved financing of $377 million for 40 projects in 45 countries in all six geographic regions to combat Avian influenza Cumulative WB commitment to HIV/AIDS is over $2.5 billion
Sources of Development Assistance for Health Source: Michaud 2006
The World Banks new HNP strategy Five broad strategic directions of the World bank Focus on HNP Results Strengthening health systems Ensuring synergies between Health Systems strengthening and priority disease interventions Intersectoral approach to HNP results Increase strategic and selective engagement with development partners.