Thank you.Your son's croup was definitely not related to his MMR 2 days earlier. However his illness about a week later was most probably a mild form of rubella [german measles] or measles. His rash was very typical of both especially the rash behind his ears.Of the two illnesses, german measles is more likely especially as he had swollen glands behind his ears and neck.This can occasionally happen following the MMR vaccination. This is definitely not an allergy.
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