| Webster's Online Dictionary |
| Expressions | Definition | ||
| Herd immunity | The effectiveness of a vaccine depends, amongst other things, on the percentage of the population which has received it and is still within the period of protection offered by that vaccine. (references) | ||
Source: compiled by the editor from various references; see credits. | Top | ||
| Expressions | Domain | Definition | |
| Herd immunity | Geology | Resistance of a group to a pathogen due to immunity of a large proportion of the group to that pathogen. (references) | |
| Herd immunity | Medicine | The resistance of a group to a disease to which a large proportion of the members are immune, thus lessening the likelihood of a patient with the disease coming into contact with a susceptible individual. Source: European Union. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
