Final answer:
Immunosenescence refers to the gradual deterioration of the immune system that happens with age, resulting in decreased efficiency in fighting off infections.
Step-by-step explanation:
Immunosenescence is the gradual deterioration of the immune system that occurs with age.
As we age, our immune system becomes less efficient at responding to infections and diseases, making us more susceptible to illness and less able to fight off infections effectively.
This process is believed to be due to a combination of factors including changes in the thymus, decreased production of immune cells, and alterations in immune cell function.
Learn more about Immunosenescence