An unimmunized newborn baby and a immune-compromised grownup with cancer both are protected from measles by others who have been immunized against measles. This is an example of ____ in action:

Question

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This scenario exemplifies herd immunity, where a group or community is protected from a disease because a large percentage of individuals within that group are immune to the disease, through vaccination or prior infection. The immunized individuals act as a barrier, preventing the disease from spreading to those who may be vulnerable, such as unimmunized newborns or immune-compromised individuals like the grownup with cancer.

An Unimmunized Newborn Baby and a Immune-Compromised Grownup with Cancer