migration and health the canadian experience – an overview seminar on migration and health 18-19...
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Migration and HealthThe Canadian experience – an overview
SEMINAR ON MIGRATION AND HEALTH 18-19 October 2004
Guatemala City
Brian Gushulak MDMigration Health Consultants Inc.
ViennaAustria
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What will I talk about?
• Why this issue is of growing importance
• What has been learned in the Canadian context that can assist as you anticipate and plan for the future
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What is different at this time?
• Many of the current practices, focus an approaches are showing their limits– Designed for immigration
challenges but faced with the challenges of population mobility
– Significantly focused on infectious diseases
– Chronic non-infectious issues are growing importance
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Major influencing factors
– Disparity• Linked to development
– Renewed interest in Public Health• Resulting from fear of disease• Risk of imbalance with real national impact
– Legislative initiatives • National and international
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This presentation will not be technical but rather policy related
• The history of the process• The development of Immigration
Screening• The influences of Emerging and Re-
emerging Diseases– HIV in the 1980s– SARS, Avian Flu currently
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Policy Initiatives
• Future challenges– Non infectious diseases
• Heart disease, diabetes • Malignancies
• Specific regional issues• New Directions in Migrant Health
– Screening for inclusion and population health improvement
– Mobility as a health parameter
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The Origins of Migration Health
• Fear of imported epidemics– Lack of understanding of the disease– Serious or loathsome consequences
• Development of Quarantine in response to Plague– Isolation, separation, warning– Later examination of new arrivals for
disease
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Why The History ?
• The history is important as it still resonates across the world– Founded on the principles of quarantine
• Several nations have recently completed or are in the process of amending quarantine legislation
• SARS and some emerging disease threats are causing nations to reconsider quarantine
• WHO is close to revising the International Health Regulations (a process that began in 1851)
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Current Sociological Linkages
• Response to fear in the absence of effective control measures or treatment– “new” diseases, uncertain
treatment, limited understanding of risk
• Often associated with the international movements of people.– Several current
associations with globalization phenomena
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Immigration Medical Screening
• Initial association with Quarantine– Infectious diseases– Screening on arrival
• Developed economic components– Ability to support
oneself– Likelihood of
becoming a “public charge”
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Photo: US National Library of Medicine
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Immigration Health until the 1970s
• Routine practices by traditional immigration receiving nations– Australia, Canada, United States– Common factor was international
movement that had expanded beyond traditional colonial population flows
• Nations with primarily historically colonial migration did not develop as extensive screening legislation
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Traditional Migration Health until the 1970s
• Infectious disease screening– Historical– National interests
and control programs• TB• STDs
• Legislatively separate from Quarantine
• Risks of cost or need for scarce medical services (Excessive Demand)– Primarily an interest
of Australia and Canada
– National Health Insurance Systems
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Factors that Influenced the Evolution of Migration Health Policies
• Post Colonial population flows
• Post Vietnam refugee movements
• HIV / AIDS• Collapse of Soviet
Union• Emerging and re-
emerging diseases
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Canadian Immigrant Source Regions Past 40 Years
(MacDonald BS Transatlantic Economic Issues and their Security Implications Atlantic Council Members Paper 03/02)
0
20
40
60
80
100
Europe Americas Asia Africa
1961 1971- 80 1991- 96 2000- 01
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New Challenges
• Movements of large numbers of individuals across greater than previous diversity limits and boundaries– Reduced administrative control– Disease epidemiology– Culture and language – Economic levels– Social and behavioral practices
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How those New Challenges Test the Limits of Traditional Migration Health Activities
• Border and frontier based• Transactional immigration
administrative roles rather than broad public health functions– Limited contact and follow up – Focus on acute or current status at time
of immigration formalities– Longer term implications assumed full
integration into host health system and similar outcomes.
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Shift from Immigration to Population Mobility as a Component of Globalization
• Asylum seekers and refugees claimants challenge off shore screening
• Large numbers of visitors and transients for whom screening was never designed
• New disease threats that may out weigh traditional immigration interests
• Slow recognition that migration health outcomes have long term implications
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Health Outcomes and Population Mobility
• Significant national impact• Long term implications• Potentially costly in terms of $$ and
programs• Extend widely beyond the health
sector• Implications for trade, security,
transportation and development
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Diverse Health Environments influence and affect Disease Epidemiology
• The capacity of many national health systems is limited.
• These limits can affect the amount and resources available to manage a health issue.
• Those limits also affect disease disparities
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Estimated TB incidence rates, 2000Source WHO Global Tuberculosis Control. WHO Report 2002. WHO/CDS/TB/2002.295
25 - 4950 - 99100 - 300
0 - 910 - 24
300 or moreNo estimate
Rate per 100 000
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How does this relate to immigration?
• As nations control, manage or eliminate some health challenges the greatest statistical risk of recurrent threat comes from mobile populations from origins less able or with less capacity to manage those risks
• Example a disease for which immigration health programs screen - TB
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Reported Tuberculosis in Canada by Birthplace
Source Data - The Public Health Agency of Canada – Tuberculosis Prevention and Control
0
10
20
30
40
50
60
70
80
90
100
Cdn-born Non-Aboriginal Cdn-born Aboriginal Foreign-born
% of C
ases
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Tuberculosis in Canada by BirthplaceSource Data - The Public Health Agency of Canada – Tuberculosis Prevention and Control
20
30
40
50
60
70
80
Total Canadian Born Foreign-born
% of C
ases
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Active Cases of TB in the Foreign Born : Canada 1988 - 2002
Source Data - The Public Health Agency of Canada – Tuberculosis Prevention and Control
0
500
1000
1500
2000
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TB Cases in Foreign-born Persons, United States, 1986-2002
Source CDC National Surveillance System Highlights from 2002
0
10
20
30
40
50
60
70
80
Percentage of Total Cases
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TB Cases in Foreign-born Persons, United States, 1986-2002
Source CDC National Surveillance System Highlights from 2002
0100020003000400050006000700080009000
10000
1986 1988 1990 1992 1994 1996 1998 2000 2002
Number of Cases
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HIV
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Leading Causes of Death
0% 5% 10% 15% 20% 25% 30% 35%
Maternal
Other
Respiratory & GI
Injuries
Cancers
Infectious Disease
CV Disease
Why do people die?
CV Disease (31%)
Infectious Disease (25%)
Cancers (13%)
Injuries (11%)
Respiratory & GI (9%)
Other (6%)
Maternal (5% )
Global deaths 1998 53.9 million Source WHO Infectious Disease Report 1999
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Why do people die in Canada?All causes of death 1997
23%
32%
23%
9%
6%
4%
3%
0%
Cancer
Cardiovascular
Heart Disease
Acute Heart Attack
Cerebrovascular Disase
Chronic Lung Disease
Trauma
HIV/AIDS
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Infectious Diseases
• 25 % of global deaths– Most in the developing world– Increased concern in the developed world– Fear of importation– Renewed interest in control measures
• Quarantine• Screening
– Often theses divide on the development index
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This Fear of Infection Creates Situations of Very Low Tolerance of Risk
• Risks that are acceptable or not controlled in some regions are managed at great cost in others
• Blood borne diseases– BSE, Chagas’,
• Enteric Diseases– ETEC– Parasitic infections
• Tuberculosis
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How Receiving Nations Manage those Risks can Affect Migration, Tourism, Trade and
Transportation• Screening of
travelers, workers, students
• Cargo, conveyances etc (Deratting)
• Travel Advisories
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Issues of Regional Potential
• Several when the much of North America is a very low prevalence area for many infections– Chagas’– TB – Enteric infections– Malaria
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Geographical origin of P. vivax malaria imported to Europe between January 1999 and September 2003 (n = 618)
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Current Directions
• When faced with new infectious disease threats there is a tendency to return to traditional approaches
• This attention draws focus from equally important issues related to non-infectious illness
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Those Traditional Approaches can have Extensive Consequences
• Quarantine and involved immigration departure or arrival screening are complex
• In globalized world events rapidly become international
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New Directions
• Slow move away from Immigration Screening Paradigm
• Growing recognition of mobility as an integral component of globalization
• Greater awareness of impact of non-infectious disease
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The Importance of Population Mobility
• As nations deal effectively with domestic health concerns, the likelihood of new challenges to those threats moves abroad.– Risk perception – Risk management– Economic impacts
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The Population Mobility Paradigm
• Four Component Parts (each with health factors)– Pre travel component– Journey Itself– Arrival component– Return component
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How the Components can Influence Health
• Pre travel component– Local environment and history impact
• Culture, economics, geography, political, social factors
• Journey itself– Duration, style, environment
• Refugees, transit, displacement, trafficking
• Arrival– Status, reception, integration
• Return– Time at destination, voluntary, assisted, forced
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Current Trends
• Quarantine– Border focus
increasing– New legislation– International
Networks to monitor and advise on application
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Current Trends
• Migration– Longitudinal Focus– Screening for
inclusion– Administration of
interventions• Malaria treatment• Immunization• ?HIV treatment
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Significant Gap in the Migration Context
• There is as yet no integrated focus on how health and population mobility relate across the globe and across time– Immigration screening has administrative
limits– Other activities tend focus on groups of
migrants as opposed to the process of mobility– The appreciation of many of the long-term
implications is limited
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There is still little attention to non infectious health issues
• On a population basis they are of greater impact
• The issues of disparity true for infections are also true
• Implications for the globalized work force
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Coordinated Approaches would be Mutually Beneficial
• Development of more appropriate tools– More prospective capacity of immigration
screening / intervention– More cost effective
– Outcome Measures would be improved by
• Collective analysis and risk mitigation• Anticipatory planning• Longitudinal study
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Benefits of an Integrated Population Mobility Focus on Health
• Share the acquired experience of the traditional immigration screening nations
• Assist in global health strategies
• Improve the health of migrants and host populations
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Gratitude
• The organizers– Juan Pedro Unger– Karen Mujica– Alejandro Navarro– Luis Monzon
• The Government of Mexico
• CIC