1. That's a risk I'd want to mitigate. 2. No there is no vaccine. I'm trying to make a point about getting a preventable life long infection with consequences running over their entire life. 3. I think preventing risk of contracting any disease outweighs the discomfort any reaction to the vaccine itself like swelling, nausea, fever. Is that what you're getting at? Experiencing symptoms of the disease/infection while the body generates its' immune response to protect you indefinitely is just something you need to live with. I've lived with that my whole life, it's not hard or scary to have a sore arm for a few days. 4. Google that, many sources say you're good for 25 years. If not lifelong.