The positive cases of HPVB19-IgM in plasma of leucocythemia, ITP and anaemia cases were 51, 97 and 56 cases respectively, the positive rate were 32. 3% , 34. 5% and 54. 9% respectively. The total positive rate was 40. 6%.

• 158例白血病患儿血清HPVB19-IgM阳性51例；阳性率32.；3%25；281例ITP患儿阳性97例；阳性率34