The elderly can have impaired immune systems, making them susceptible to infections that can take longer to heal. Which of the following would be most helpful in preventing these types of illnesses in the elderly? (5 points) Older people should avoid exercise so that their bodies are not exposed to stress. Older people should regularly take antibiotics to prevent development of infection. Older people should be vaccinated for common viruses like the flu virus. Older people should consume large amounts of protein to boost their immune system.