The calculation of a multiplier depends on the disease transmission dynamics and the context in which it is applied. Here are some common methods:
- Basic Reproduction Number (R0): This is the average number of secondary infections produced by a single infected individual in a fully susceptible population. For instance, if R0 is 3, each infected person will, on average, infect three others. - Attack Rate: The proportion of exposed individuals who become infected over a specified period. It can be used to calculate the multiplier for specific events or outbreaks. - Secondary Attack Rate: This is the probability that an infection occurs among susceptible people within a specific group (e.g., household contacts).