Positive nucleic acid(NA)results have been found in recovered and discharged COVID-19 patients,but the proportion is unc......

用间接免疫荧光法和酶联免疫吸附试验,对39例外科手术患者输血前后双份血清巨细胞病毒抗体进行了检测,证实大量输血可以引起外科手......