While many parents can breathe a sigh of relief with their own vaccinations, it may be hard to feel free as long as their children are unvaccinated. CNN Medical Analyst Dr. Leana Wen weighs in.While many parents can breathe a sigh of relief with their own vaccinations, it may be hard to feel free as long as their children are unvaccinated. CNN Medical Analyst Dr. Leana Wen weighs in.