Univariate analysis identified duration of fever, peak body temperature, pleural effusion, rash, WBC, N%, L%, PLT, LDH, CRP, CD3+ cells, CD3 + CD4+ cells, CD3 − CD19+ cells and CD19 + CD23+ cells as significant corticosteroid-resistant RMPP risk factors. This evidence concerns the gene CD19 and Pleural effusion.