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is the average number of people infected from one other person. For example, Ebola has an of two, so on average, a person who has Ebola will pass it on to two other people.. In epidemiology, the basic reproduction number, or basic reproductive number (sometimes called basic reproduction ratio or basic reproductive rate), denoted (pronounced R nought or R zero), [1] of an infection is the ...
The method to compute the basic reproduction ratio using the next-generation matrix is given by Diekmann et al. (1990) [3] and van den Driessche and Watmough (2002). [4] To calculate the basic reproduction number by using a next-generation matrix, the whole population is divided into n {\displaystyle n} compartments in which there are m < n ...
The net reproduction rate (R 0) is the number of surviving daughters per woman and an important indicator of the population's reproductive rate. If R 0 is one, the population replaces itself and would stay without any migration and emigration at a stable level.
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The gross reproduction rate (GRR) is the average number of daughters a woman would have if she survived all of her childbearing years, which is roughly to the age of 45, subject to the age-specific fertility rate and sex ratio at birth throughout that period.
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The key difference is a basic reproductive rate is in a hypothetically immunologically naive population. This is actually really, really important for Omicron because it is immune evading variant. What that means is that a large part of increase in transmissibility reported in those papers is due to immune evasion, NOT having a higher R0.
The first lists show the most recent year where there is published total fertility rate (TFR) data ranked by sovereign states and dependencies, and are ordered by organization type – intergovernmental, governmental, or non-governmental organization that searched, organized, and published the data.