Table 2: Plasma cytokine levels in patients with ME/CFS.

Viral infectionTNF-alpha
(pg/mL)
IL-6
(pg/mL)
IL-4
(pg/mL)

Without ( )7.71 ± 3.071.32 ± 0.43<2
Latent ( )18.81 ± 2.522.56 ± 1.02<2
Active ( )
Single HHV-7 ( )44.81 ± 10.567.76 ± 2.45<2
 Single B19 ( )44.12 ± 11.6715.62 ± 4.63<2
 Dual HHV-6 + HHV-7
  ( )
50.38 ± 8.7411.22 ± 3.14<2
 Dual HHV-7 + B19
 ( )
49.89 ± 16.128.70 ± 3.05<2
 Triple HHV-6 + HHV-7 +
 B19 ( )
73.33 ± 18.7629.67 ± 4.52<2