The Modern World 2 Flashcards
Social determinants of health
- ‘social and economic factors that influence peoples health… apparent in the living and working conditions that people experience everyday
- income, education, unemployment, job security, working conditions
- early childhood development, social exclusion, social safety network
- food insecurity, housing, access to health services
- aboriginal status, gender, race, disability
epidemiology and demography
- epidemiological transition theory is derived from demographic transition theory
- epidemiological transition theory explains an important component of the demographic transitions by describing the varying patters of disease that are important contributors to morality
demography
- structure of human populations (births deaths incidence of disease)
- demographic transitions; changes in demographic patterns over time, often associated with epidemiological transitions
first phase demographic transition
- high birth rate, high death rate (low natural increase)
second phase demographic transitions
- high birth rates, decreasing death rates (high natural increase)
third phase demographic transitions
- declining birth rates, low death rate maintained (slowed population growth)
final phase demographic transitions
- declining birth rates, replacement equals or does not exceed death rate (no increase/decrease)
crude birth rate (CBR)
births per year/ births per 1000 people
crude death rate (CDR)
deaths each year/ deaths per 1000 people
rate of natural increase
CBR-CDR
demographic transitions
- broad patterns in demographic trends related to fertility and morality
population pyramids
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socual implications of demographic change
- dependency ratio
global population
8.2 billion
prediction for 2100 population
10.4 billion
japan population
- change in demographic structure
- age in population decline
whats happening since the third transition
- resurgence of infectious diseases
- new infectious diseases
- climate change
infectious diseases
- persistent and/or re-emerging
- cholera, plague, influenza, helminths, tuberculosis, polio, measles, scarlet fever, diptheria
cholera
- Gastrointestinal disease
- bacterial infection (vibrio cholerae)
- spread through waste-contaminated food and water
- waves of epidemics, high mortality rates, varies with environmental conditions
poliomyelitis
- poliovirus
- strong impact on children (franklin delano roosevelt)
- very effective vaccination developed in the 50s
- 1988 international campaign to eradicate polio
- as of october 2015, 99% reduction
- eradication ongoing; endemic in afganistan and pakistan, hunt for osama bin laden
bubonic plague
- caused by a bacterua called yersinia pestis
- zoonotic disease spread from flees on rats
- major historical disease (1/3 of european population died)
- still occurs in some regions today
- 2017 outbreaj in madagascar
tuberculosis
- caused by a bacterium called myobacterium tuberculosis
- at one point #1 cause of death in europe and americas
- prevalence declined with improved sanitation and medication
- Reemergence between 1985 and 1991, multi drug resistant forms, economic disparities
- very low rate in canada, cases are related to health and social inequalities
emerging infectious diseases
- ebola
- HIV/AIDS
- lyme disease
- COVID-19
ebola
- ebola virus
- zoonotic disease
- first outbreak in 1976, democratic republic of congo, 90% fatality rate
- outbreaks restricted by local health authorities
- 2014 epidemic
HIV/AIDS
- HIV first identified as cause of AIDS in 1983
- primate origin (SIV)
- can have 7-10 year latency period
- global distribution
sydemic patterns of infectious diseases
- a pattern of two or more health conditions or diseases that cluster in a population, interact, and worsen the health of the population
- coinfection
- ex. HIV/AIDS with tuberculosis
COVID-19
- coronavirus (RNA virus)
- arised from zoonotics
distribution of vaccination
- who has access?
- what happens without access?
- vaccination an associated research
- concern of vaccine hesitancy
- herd immunity threshold
lyme disease
- tick-borne
- current shifts in distribution due to climate change
other emerging challenges
- Opioid related mortality
- high mortality at reletively younger ages
- increasing proportion of young-to-middle age mortality
- ages 25-54