Table 3: Symptoms of ME/CFS in patients with active viral infection/coinfection.

Defining symptoms Active viral infection HHV-6 () HHV-7 () B19 () HHV-6 + HHV-7 () HHV-7 + B19 and HHV-6 + HHV-7 + B19 () Subfebrility 0/2 14/28 0/11 7/10 14/19 Lymphadenopathy 2/2 21/28 0/11 8/10 10/19 Malaise after exertion 2/2 28/28 0/11 9/10 14/19 Muscle pain 2/2 28/28 11/11 10/10 19/19 Multijoint pain 2/2 7/28 11/11 10/10 19/19 Impaired memory 0/2 7/28 0/11 6/10 9/19 Impaired concentration 2/2 7/28 11/11 4/10 10/19 Sleep disturbances 2/2 7/28 11/11 10/10 19/19 New headaches 0/2 14/28 11/11 0/10 5/19