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[mass noun] The resistance to the spread of a contagious disease within a population that results if a sufficiently high proportion of individuals are immune to the disease, especially through vaccination:‘the level of vaccination needed to achieve herd immunity varies by disease’
- ‘Because of the herd immunity that exists because of mass vaccination, the unvaccinated are also protected.’
- ‘The result has been outbreaks of measles - children have received ineffective injections leading to a breakdown in herd immunity.’
- ‘High immunisation rates may result in herd immunity, which increases protection for all residents, including the weakest patients.’
- ‘Uncertainty about the level of herd immunity generated by vaccination programmes limits modelling of the potential benefits of booster vaccination.’
- ‘A good herd immunity effect dramatically controlled the disease initially.’
- ‘The vaccination is seen as a way to achieve herd immunity as it stops the spread of the illness from children to others that are vulnerable to flu.’
- ‘Children whose parents opt not to vaccinate decrease herd immunity, which protects populations from communicable diseases.’
- ‘They found no evidence that vaccination prevents viral transmission, putting the whole herd immunity myth once again into question.’
- ‘There, public health officials have now documented mass HPV vaccination and the first glimmers of herd immunity.’
- ‘Neither one really addressed the question of mandatory vaccination and its effect on mortality and herd immunity.’
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