Pandemic Flashcards
Pandemic: No viruses circulating among animals have been reported to cause infections in humans
Phase 1
Pandemic: animal virus causing infection in humans
Phase 2
Pandemic: (+) sporadic cases or small clusters of disease in humans
Phase 3
Pandemic: community-level outbreaks
Phase 4
Pandemic: Human-to-human spread of the virus into at least two countries in one WHO region
Phase 5
Pandemic: Community-level outbreaks in at least one country in a different WHO region
Phase 5
Long term fluctuation of disease occurrence
Secular trend
Short term fluctuation of disease occurrence
Epidemic
Increase in number of cases regularly due to accumulation of susceptibility through birthds; exhibited by disease that confers long-lasting immunity
Cyclic intrinsic variation
Fluctuation of disease occurrence during a year reflecting climactic (seasonal) changes
Sectional variation
Epidemic curve: water-borne
Classical
Epidemic curve: food poisoning
Inverted
Epidemic curve: contact transmission
Bell-shaped
Epidemic curve: vector-borne
Point