Epidemiology, Influenza and Pandemics Flashcards
1
Q
Describe Epidemiology
A
Study of how often diseases occur in different groups of people and why
2
Q
What study types are useful in Epidemiology?
A
1) Ecological
2) Cross-Sectional
3
Q
How many types of influenza are there?
A
A: Infections in pigs, cats, horses, birds, sea mammals, -> Severe, extensive outbreaks
B: Prone to mutation, seen in children and less severe outbreaks
C: Minor disease with mild or no symptoms
4
Q
How is influenza transmitted?
A
Through aerosols via coughs and colds
5
Q
What is antigenic drift?
A
Spontaneous mutation that leads to a minor change (Epidemic)
6
Q
What is antigenic shift?
A
Emergence of a new subtype difference to previous viral form (Pandemic)