Immunosenescence is the gradual deterioration of the immune system that occurs with aging. This decline in immune function makes older individuals more susceptible to infections, autoimmune diseases, and cancer. Research in immunosenescence aims to understand the mechanisms underlying this decline and develop interventions to improve immune function in older adults. Studies in this area often focus on changes in immune cell function, inflammation, and the impact of aging on vaccine responses. Ultimately, the goal is to enhance the immune health of older adults and improve their quality of life.