Disease-spread models, outbreak metrics and population-health measures
Rate at which new cases of a disease appear in a population over a given period.
Proportion of a population that has a particular condition at a point in time.
Average number of secondary infections produced by one infected individual in a fully susceptible population.
Minimum fraction of the population that must be immune to prevent sustained spread.
Actual average infections per case when part of the population is already immune.
Rate of change of the susceptible population in the SIR compartmental model.
Rate of change of the infected population — new infections minus recoveries.
Rate at which infected individuals recover and gain immunity.
Proportion of diagnosed individuals who die from the disease.
Proportion of an exposed population that develops the illness during an outbreak.
How many times more likely the exposed group is to develop the disease compared to the unexposed group.
Ratio of the odds of exposure among cases versus controls in a case-control study.
Number of patients who must receive a treatment for one additional patient to benefit.