
Immunosenescence refers to the gradual deterioration of the immune system brought on by natural age advancement. It involves both the host’s capacity to respond to infections and the development of long-term immune memory, especially by vaccination. This age-associated immune deficiency is ubiquitous and found in both long- and short-living spec...
Found on
http://en.wikipedia.org/wiki/Immunosenescence

The changes in the immune system associated with age. Refers to the age-associated decline of the immune system that may contribute to the increased incidence and severity of infectious diseases and possibly certain cancers in the elderly.
Found on
https://www.futurelearn.com/info/courses/the-role-of-vaccines-in-preventing
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