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I'm adding back in my image of the slapped cheeks as this was the definitive diagnostic symptom in my daughter's case. As I said in response to David's request: I think I'll leave my wording, but thanks for the discussion! At The Skin Disease Archive, when talking about Fifth Disease, they reference both rashes as being quite similar: ""It is called slapped cheek syndrome because the children suffering from this disease show rosy slapped-like cheeks....It is the fifth of five common child diseases that cause similar skin rashes (measles, rubella, scarlet fever, Filatov-Dukes disease and slapped cheek syndrome)."" I believe this supports the wording that both diseases have a slapped-cheek look as a possible symptom. In my daughters case, it was *the* symptom (along with the white mustache) that allowed a positive diagnosis. Estreya (talk) ""   "