84. Erythema infectiosum(又稱為 fifth disease)是由下列何種病原體所造成的?
(A)Human herpes virus type 6
(B)Parvovirus B19
(C)Human papilloma virus
(D)E-B virus

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統計： A(0), B(3), C(0), D(0), E(0) #898589