Disease Incidence and Prevalence (HSC SSCE Biology): Flashcards
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Incidence
Incidence
Number of NEW cases during a specific time period
Prevalence
Prevalence
ALL cases (new + existing) at a point in time
Incidence vs prevalence key difference
Incidence vs prevalence key difference
Incidence=risk of getting; prevalence=how widespread
Incidence formula
Incidence formula
(new cases / population at start) × 100
Prevalence formula
Prevalence formula
(all cases / population) × 100
Herd immunity
Herd immunity
High immunisation reduces pathogen transmission to all
Population mobility's role in disease spread
Population mobility's role in disease spread
Humans act as carriers, spreading pathogens when travelling
Digital epidemiology
Digital epidemiology
Tracking disease via time-stamped, geo-tagged online data
3 key data types for disease control
3 key data types for disease control
Incidence/prevalence, mobility, immunisation rates
Australia infectious disease deaths: century ago vs 2009
Australia infectious disease deaths: century ago vs 2009
13% a century ago; 1.3% in 2009