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  2. Basic reproduction number - Wikipedia

    en.wikipedia.org/wiki/Basic_reproduction_number

    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 ...

  3. Basic reproductive rate - Wikipedia

    en.wikipedia.org/?title=Basic_reproductive_rate&...

    Pages for logged out editors learn more. Contributions; Talk; Basic reproductive rate

  4. List of countries by net reproduction rate - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by_net...

    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.

  5. Fertility - Wikipedia

    en.wikipedia.org/wiki/Fertility

    Net Reproduction Rate (NRR) - the NRR starts with the GRR and adds the realistic assumption that some of the women will die before age 49; therefore they will not be alive to bear some of the potential babies that were counted in the GRR. NRR is always lower than GRR, but in countries where mortality is very low, almost all the baby girls grow ...

  6. Next-generation matrix - Wikipedia

    en.wikipedia.org/wiki/Next-generation_matrix

    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 ...

  7. List of countries by past fertility rate - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by_past...

    This is a list of countries showing past fertility rate, ranging from 1950 to 2015 in five-year periods, as estimated by the 2017 revision of the World Population Prospects database by the United Nations Population Division.

  8. Gross reproduction rate - Wikipedia

    en.wikipedia.org/wiki/Gross_reproduction_rate

    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.

  9. Sex ratio - Wikipedia

    en.wikipedia.org/wiki/Sex_ratio

    The tertiary sex ratio is equivalent to the adult sex ratio (ASR), which is defined as the ratio of adult males to females in a population. [ 6 ] [ 7 ] The operational sex ratio (OSR) is the ratio of sexually active males to females in a population, and is therefore derived from a subset of the individuals included when calculating the ASR. [ 7 ]