Why are those who cannot be vaccinated for childhood diseases safer if everyone around them is vaccinated?

{20 points} hello. for my p.e. class i need to interview people about at health and wellness. so answer the questions below. interviewee name: age: gender: job: date and time of interview: 1. what are some major health concerns that you have? 2. are there ways that you know you can monitor and prevent these health concerns (or other concerns like obesity)? 3. how do family members influence your health? if you need to find out more about a specific health issue, what do you do? be specific. (don’t let them say “look on the internet”, because we have already learned that not everything on the internet is reliable! they should tell you a specific site if they use the internet as a source.) 4. what do you think is the biggest health concern facing our country? 5. what are some things that you do to monitor your health? 6. how would you get the word out about this major health concern? 7. how do you think the media influences what concerns we have for our health? 8. what are some future goals involving your health and well being? 9. why is it important to monitor your health, specifically to you? 10. and what influences you stay healthy?