Search results
Herd immunity (also called herd effect, community immunity, population immunity, or mass immunity) is a form of indirect protection that applies only to contagious diseases.
Apr 24, 2020 · Herd immunity—or community immunity—is based on the idea that as more people develop immunity to a disease, they help prevent the spread to others who are more vulnerable.
- www.who.int
- › Newsroom
- › Questions and answers
- › item
Dec 31, 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.
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.
Jun 1, 2024 · Herd immunity is the name for a point in time when it's hard for a disease to spread through a group of people. The idea of herd immunity works for some diseases, such as measles. But it's a harder concept to apply to illnesses like coronavirus disease 2019 (COVID-19).
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.
- www.ncbi.nlm.nih.gov
- › …
- › v.118(21); 2021 May 25
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.
- www.ncbi.nlm.nih.gov
- › …
- › Elsevier - PMC COVID-19 Collection
May 5, 2020 · Herd immunity: the indirect protection from infection conferred to susceptible individuals when a sufficiently large proportion of immune individuals exist in a population. Herd immunity threshold: the point at which the proportion of susceptible individuals in a population falls below the threshold needed for transmission.
Dec 6, 2023 · Herd immunity, or community immunity, is when a large part of the population of an area is immune to a specific disease. If enough people are resistant to the cause of a disease, such as a...
Jun 1, 2024 · herd immunity, state in which a large proportion of a population is able to repel an infectious disease, thereby limiting the extent to which the disease can spread from person to person. Herd immunity can be conferred through natural immunity, previous exposure to the disease, or vaccination.
