Contagious skin infection common in children characterised by small blisters (8)

I believe the answer is:

impetigo

(Other definitions for impetigo that I've seen before include "unsightly condition" , "Contagious skin disease with crusty spots" , "Skin condition" , "sickness" , "Contagious skin infection common in children" .)

I've seen this clue in The Mirror.

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