You have set out your concerns here very well. I agree that it is a long period after the Prevenar for your son to be unwell, but that does appear appear to be the most likely cause here. He became ill on the day that he had the Prevenar and has run a fever since then. Only give him something for fever such as Calpol which he should take as it tastes good or you can use the Empaped suppositories. If he is no better by this Friday please ask your paediatrician to see him again.
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