By march 7 , the rash had worsened , with umbilicated lesions with an erythematous base , mostly on the hands , forearms , neck , chest , face , and knees , encompassing 50 % of the keratinized skin 3月7日皮疹加重，红斑基础上的脐状皮损主要在双手、双前臂、颈、胸、面和双膝，包绕角质化皮肤的50 % 。
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