As a teacher, helping others is vitally important to me. By minimising catching something, I maximise the pool of people I can be helpful to. I generally don’t like needles, but since I have weak immunity, prevention is important to me, and that includes vaccinations. Prevention is always better than intervention. In the end it’s also cheaper. If a teacher wants to teach in a classroom, and if they want that to last as long as possible, it stands to reason that they should do their best to reduce the likelihood of spreading the disease. It’s only logical to start with yourself.