On your last birthday, your neighbor told you, Everything is downhill from here. He believes there is nothing that can prevent or minimize the effects of aging on your lymphatic and immune systems. Explain to your neighbor how aging impacts these systems. Also share your opinion on preventative methods. Is your neighbor correct in his thinking or not, then explain your reasoning?
For your citation, you might use articles that show examples of positive or negative effects of aging on the lymphatic and immune systems. You can also find articles from experts that suggest best practices for age-related preventative methods.