Fig. (3) Description of the distribution of viral PCRs found positive (in more than two samples) according to patient age. The viruses are listed according to the numerosity of tests requested. EV: enterovirus; EBV: Epstein–Barr virus; HSV: herpes simplex virus; VZV: varicella zoster virus; HHV-7: human herpes virus-7; HHV-6: human herpes virus-6; CMV: cytomegalovirus; JCV: JC virus HHV-7 tested from January 2013.