1. The three vaccinated chimps developed varying levels of either antibody or cellular immunity . 2. Its role in blunting an immune attack awaited the discovery of adaptive cellular immunity . 3. The advances involve vaccines that focus on stimulating cellular immunity , rather than just antibodies. 4. But cellular immunity is effective, often for years. 5. T-cell vaccines are designed to induce cellular immunity . 6. There are some viruses in which cellular immunity is critical and antibody immunity is absolutely irrelevant. 7. Vaccines that stimulate cellular immunity , or both cellular and antibody defenses, are in various stages of development. 8. It is a system of " cellular immunity " that the body routinely uses to protect itself. 9. The Harvard study shows that a strategy for stimulating this " cellular immunity " has worked in monkeys. 10. Because of impaired cellular immunity , loneliness among young adults shows vaccines, like the flu vaccine, to be less effective.