Final answer
Because memory B cells do not last forever, you need to get a(n) Booster shot for tetanus every ten years.
Step-by-step explanation:
Finite Lifespan of Memory B Cells: Memory B cells are a crucial part of the immune system responsible for "remembering" past infections. However, over time, these memory cells decline in number.
Tetanus Booster Shot: Tetanus is a bacterial infection, and booster shots help maintain immunity by reinforcing the body's defenses against the tetanus toxin. These boosters typically contain inactivated toxins to stimulate a protective immune response.
Every Decade: The recommendation for a tetanus booster shot every ten years is based on the declining effectiveness of the immune response over time. This interval ensures a sufficient level of immunity is maintained.
Memory B Cells' Lifespan: Memory B cells, formed after initial exposure to an antigen (like the tetanus toxin), decline naturally over time. This decline can leave an individual susceptible to infections after a certain period.
Tetanus Booster Shot: Tetanus boosters, commonly combined with other vaccines (e.g., diphtheria and pertussis), aim to stimulate the immune system to produce more antibodies and memory cells specific to tetanus.
Every Decade: The ten-year interval is determined based on studies assessing the waning effectiveness of the immune response and the need to ensure continued protection.
It's crucial to understand the concept of memory B cells, the purpose of booster shots, and the recommended frequency to appreciate why a tetanus booster is necessary every ten years.