Who said that? People often make bad policy with good intentions. And maybe it's good policy, but you haven't presented a very good case other than "experts say so". Also, you may note that I think the parents/family are by far the worst actors here. We all have to adhere to what we perceive to be bad policy sometimes. It's pretty clear the risk of not getting the kidney by refusing vaccination is worse than any risk of potential harm from getting the vaccine.