Fig. 7

HR-HPV types with increasing, asymptotic and U-shaped prevalence trends for neoplastic lesions of increasing severity. a HR-HPV types with the three groups of trends (increasing, asymptotic, U-shaped) are placed in the x-axis in descending order of prevalence of the CC cases. The height of the bars is proportional to the prevalence of each viral type in lesions of increasing severity: LSIL (green), HSIL (blue) and CC (red). b Examples of prevalence trends of three HR-HPV types as a function of the severity of neoplastic lesions: increasing for HPV16, asymptotic for HPV68 and U-shaped for HPV33