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Chickenpox rash appears as successive crops of lesion
So the rashes on the body will show different phase of healing - Some will be new, some will be healing , some will be having crust and some totally healed
It may be associated with itching.scratching may lead to secondary bacterial infection. This may delay the healing.
A newer crops of lesions and a possible secondary bacterial infection might explain the rash still persisting in a particular area on the body
She will remain contagious till all the lesions become crusted.