among 136 serum samples from various age groups , there were five ( 4 % ) with no detectable antibodies against bk or jc virus , 75 ( 55 % ) with antibodies against both viruses , 41 ( 30.1 % ) with antibodies against only bk virus and 26 ( 19 % ) with antibodies against only jc virus .
C0003241
antibodies
C0003253
antibodies