Roland - Epidemiology Flashcards
1
Q
Definition of prevalence.
A
Fraction of people with disease.
2
Q
Definition of incidence:
A
no of people acquiring the disease per unit of time.
3
Q
Definition of R0.
A
Basic reproduction number, number of secondary infected people. Herd immunity based on that number.
4
Q
How can infectious diseases be modelled ?
A
Mathematically : r0 captures the potential for spread and correlates with many epidemiological parameters.
5
Q
What parameters are important to determine periodic frequency of epidemics?
A
Birth rate, lasting immunity, death rate, infectivity, recovery rate.
6
Q
What parameters are important to model virus dynamics?
A
Cell generation rate Cell death rate Infectivity Shedding rate Clearance rate
7
Q
Why is R0 maximised by evolution?
A
In the case of HIV, no recovery, so R0 value is the highest.
