American citizens have the right to make a personal  decision regarding their healthcare. 
No man, woman, or child living in the United States should ever be forced to take any medication, vaccination, or treatment they do not want (no matter what the reason).

This country was founded on the premise that we possess “unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.--That to secure these rights, Governments are instituted among Men, deriving their just powers from the consent of the governed” (Declaration of Independence, 1776). 
Hence, we give you power, you (government/governing bodies) do not possess this power on your own and have not right to force unwanted medical treatments especially with children that hospitalizations are rare, rarer than the flu.