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  2. Herd immunity - Wikipedia

    en.wikipedia.org/wiki/Herd_immunity

    Herd immunity (also called herd effect, ... Herd immunity simulation This page was last edited on 23 January 2025, at 18:40 (UTC). Text is available ...

  3. Mathematical modelling of infectious diseases - Wikipedia

    en.wikipedia.org/wiki/Mathematical_modelling_of...

    Graph of herd immunity threshold vs basic reproduction number with selected diseases. S will be (1 − q), since q is the proportion of the population that is immune and q + S must equal one (since in this simplified model, everyone is either susceptible or immune). Then:

  4. Exercise Cygnus - Wikipedia

    en.wikipedia.org/wiki/Exercise_Cygnus

    The Daily Telegraph reported in March 2020 one government source as saying that the results of the simulation were "too terrifying" to be revealed. [2] According to The Telegraph, the exercise led to assumptions that a "herd immunity" approach would be the best response to a similar epidemic.

  5. Outline of infectious disease concepts - Wikipedia

    en.wikipedia.org/wiki/Outline_of_infectious...

    Herd immunity – Indirect protection of susceptible individuals from infectious diseases when a large proportion of a population becomes immune, either through vaccination or prior infection, reducing overall transmission risk. Infection rate – Rate at which new infections occur within susceptible individuals over a defined period.

  6. WHO Scientist Says Herd Immunity Won't Be Achieved This ... - AOL

    www.aol.com/news/scientist-says-herd-immunity...

    Several countries have started giving COVID-19 vaccinations but the World Health Organization's chief scientist says it won't be enough to reach worldwide herd immunity in 2021. She stressed ...

  7. Viral phylodynamics - Wikipedia

    en.wikipedia.org/wiki/Viral_phylodynamics

    These sweeps were driven by herd immunity and acted to constrain viral genetic diversity. Instead of modeling the genotypes of viral strains, a compartmental simulation model by Gökaydin and colleagues [51] considered influenza evolution at the scale of antigenic clusters (or phenotypes). This model showed that antigenic emergence and ...

  8. 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 ...

  9. Pandemic predictions and preparations prior to the COVID-19 ...

    en.wikipedia.org/wiki/Pandemic_predictions_and...

    The Daily Telegraph reported one government source as saying that the results of the simulation were "too terrifying" to be revealed. [19] According to The Telegraph, the exercise led to assumptions that a "herd immunity" approach would be the best response to a similar epidemic.