File:HERD IMMUNITY AND COVID-19 VACCINES- A BRIEF DISCUSSION.jpg
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English: Figure- 2-Simple threshold model for achieving herd immunity, A- showing relationship between the HIT (herd immunity threshold), (R0 – 1)/R0 = 1 - 1/R0, and R0 (basic reproduction number), in a randomly mixing standardized uniform population. Ranges of R0 can vary considerably between populations as well as ranges of immunity coverage required to exceed the threshold. B- Showing cumulative lifetime incidence of infection in unvaccinated individuals as a function of the level of random vaccine coverage of whole population, as predicted by a simple susceptible-infected-recovered model for a omnipresent infection with R0 = 3 . This assumes a 100% effective vaccine (E = 1). Note that the probable growing incidence is 0 if coverage is maintained above VC = 1- 1/R0 = 67%. |
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| Author | Drpiyush003 |
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| current | 11:56, 19 December 2021 | | 1,224 × 1,584 (132 KB) | Drpiyush003 (talk | contribs) | Cross-wiki upload from en.wikiversity.org |
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