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- Herd immunity means that enough people in a group or area have achieved immunity (protection) against a virus or other infectious agent to make it very difficult for the infection to spread.
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Nov 4, 2023 · Herd immunity makes it possible to protect the population from a disease, including those who can't be vaccinated, such as newborns or those who have compromised immune systems. But reaching herd immunity through vaccination against COVID-19 will likely be difficult for many reasons.
Mar 16, 2022 · Herd immunity means that enough people in a group or area have achieved immunity (protection) against a virus or other infectious agent to make it very difficult for the infection to spread. Immunity happens in multiple ways: through natural infection, vaccination or passive transfer.
Dec 31, 2020 · Updated 31 December 2020. What is ‘herd immunity’? 'Herd immunity', also known as 'population immunity', is the indirect protection from an infectious disease that happens when a population is immune either through vaccination or immunity developed through previous infection.
- What is ‘herd immunity’?'Herd immunity', also known as 'population immunity', is the indirect protection from an infectious disease that happens when a population is immun...
- What is WHO’s position on ‘herd immunity’ as a way of fighting COVID-19?Attempts to reach ‘herd immunity’ through exposing people to a virus are scientifically problematic and unethical. Letting COVID-19 spread through...
- What do we know about immunity from COVID-19?Most people who are infected with COVID-19 develop an immune response within the first few weeks after infection. Research is still ongoing into ho...
- What is WHO’s position on ‘lockdowns’ as a way of fighting COVID-19?Large scale physical distancing measures and movement restrictions, often referred to as ‘lockdowns’, can slow COVID‑19 transmission by limiting co...
Herd immunity occurs when a significant portion of a population becomes immune to an infectious disease and the risk of spread from person to person decreases; those who are not immune are indirectly protected because ongoing disease spread is very small.
- Angel N. Desai, Maimuna S. Majumder
- 2020
May 5, 2021 · The idea underlying herd immunity is that the proximity of immune individuals shields others who are still susceptible from infection, Fine explains. And, with enough immune people in the population, the herd becomes a defensive wall that denies the virus pathways to keep spreading.
May 5, 2020 · Herd immunity stems from the effects of individual immunity scaled to the level of the population. It refers to the indirect protection from infection conferred to susceptible individuals when a sufficiently large proportion of immune individuals exist in a population.
