Family Species Name of Test or Epitope N Seropositive (%) IgG Levels a Herpesviridae cytomegalovirus P28 1,065 (45.1) 8.0 ± 1.1 P150 1,049 (44.4) 7.9 ± 1.0 Epstein-Barr virus EBNA 2,162 (91.5) 8.9 ± 0.5 herpes simplex virus-1 Novagnost HSV1 IgG 1,473 (62.3) 10.4 ± 0.4 varizella zoster virus Enzygnost Anti-VZV/IgG 2,304 (97.5) 13.7 ± 0.6 Orthomyxoviridae influenza A virus Novagnost Influenza A IgG 1,594 (67.5) 10.0 ± 0.4 influenza B virus Novagnost Influenza B IgG 497 (21.0) 9.5 ± 0.2 Paramyxoviridae measles virus Enzygnost Anti-Measles Virus/IgG 2,177 (92.1) 15.1 ± 0.9 mumps virus Enzygnost Anti-Parotitis Virus/IgG 1,862 (78.8) 14.6 ± 0.7 Parvoviridae parvovirus B19 Novagnost Parvovirus B 19 IgG 1,664 (70.4) 10.9 ± 0.4 Polyomaviridae BK polyomavirus VP1 2,226 (94.2) 8.4 ± 1.0 JC polyomavirus VP1 1,268 (53.7) 7.1 ± 0.8 Merkel cell polyomavirus VP1 1,871 (79.2) 8.0 ± 1.0 trichodysplasia spinulosa-associated polyomavirus VP1 2,020 (85.5) 8.9 ± 1.1 Togaviridae rubella virus Enzygnost Anti-Rubella Virus/IgG 2,216 (93.8) 11.4 ± 0.9