A 7-year-old girl developed an erythematous malar rash with perioral pallor that has now spread to the extremities and evolved into a macular to morbilliform, lacy, reticular rash. The rash was preceded by headache, runny nose, low-grade fever, and sore throat. Her serum is positive for immunoglobulin M (IgM) antibodies against a small DNA virus. What is the most likely diagnosis?
A. Measles
B. Varicella
C. Rubella
D. Erythema infectiosum
E. Scarlet fever
A. Measles
B. Varicella
C. Rubella
D. Erythema infectiosum
E. Scarlet fever