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In epidemiology, the attack rate is the proportion of an at-risk population that contracts the disease during a specified time interval. [1]
The rate at which the consumer encounters food items per unit of food density is called the attack rate, a. The average time spent on processing a food item is called the handling time, h. Similar equations are the Monod equation for the growth of microorganisms and the Michaelis–Menten equation for the rate of enzymatic reactions. [4]
In epidemiology, force of infection (denoted ) is the rate at which susceptible individuals acquire an infectious disease. [1] Because it takes account of susceptibility it can be used to compare the rate of transmission between different groups of the population for the same infectious disease, or even between different infectious diseases.
Calculating the infection rate is used to analyze trends for the purpose of infection and disease control. [1] An online infection rate calculator has been developed by the Centers for Disease Control and Prevention that allows the determination of the streptococcal A infection rate in a population.
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To measure incidence rate you must take into account how many years each person contributed to the study, and when they developed HIV because when a subject develops HIV he stops being at risk. When it is not known exactly when a person develops the disease in question, epidemiologists frequently use the actuarial method, and assume it was ...
= Attack rate of unvaccinated people, A R V {\displaystyle ARV} = Attack rate of vaccinated people. An alternative, equivalent formulation of vaccine efficacy is: V E = ( 1 − R R ) × 100 % , {\displaystyle VE=(1-RR)\times 100\%,} where R R {\displaystyle RR} is the relative risk of developing the disease for vaccinated people compared to ...
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