Building a strong immune system is crucial for preventing and surviving cancer, as well as fighting off COVID-19. Jenny Brandt shares her eight-step plan for boosting the immune system, which includes proper hydration, nutrition, and rest. She emphasizes the importance of taking personal responsibility for one's health and not relying solely on medical treatments. Jenny's approach has helped her recover from cancer and has given hope to many caregivers and individuals struggling with autoimmune disorders.