I do understand what you might be feeling - it is fearful to think that your child could be hurt. Any parent would feel bad about it. However, the more you focus on the unwanted, the more fear you will feel. Even if you don't speak of it, your child will pick up the same vibration of fear.
We live in a vibrational Universe. If we carry too many vibrations of fear, then we are likely to attract more of it and things that match that fear will be magnetised to us.
The best thing any parent can do is to be hopeful and happy around their children - that way our children get to learn that they are invincible and can overcome any obstacles. There are always solutions to every situation.
I have worked in natural healthcare for many years. It constantly amazes me how wonderfully self healing our bodies are. Look around you, there is more evidence of wellbeing than sickness. It's proof that our bodies know what to do. We must trust our bodies more.
If we focus on feeding ourselves well, and living a happy life, then our immune systems will reward us with strength even when faced with adversity. I agree that vaccinations are completely unnecesary and potentially harmful - however, I 100% believe that our bodies are way more powerful than some vaccine ... and if we tend to our lives and our bodies to create a lot of inner strength, a vaccine will not harm in the long run.
The good news is that those of us on CZ know how to detox - milk thistle is a great herb to have on hand for any poison you want flushed out quickly. You have knowledge that you can use. Trust yourself to be able to apply it if you need to.
Keep the faith. We live in a beautiful Universe. Don't let something like this hurt you, but use this contrast to gain knowledge to help yourself and others.