Fig. 4From: The persistent viral infections in the development and severity of myalgic encephalomyelitis/chronic fatigue syndromeFrequency of persistent HHV-6A/B, HHV-7 and B19V infection/co-infection (%) in latent (a) or active (b) phase. HHV-human herpesvirus, B19V–human parvovirus B19, AHI–apparently healthy individuals. * statistically significant (p < 0.05)Back to article page