Fig. 2
From: High prevalence of co-infection between human papillomavirus (HPV) 51 and 52 in Mexican population
The frequency of low-risk HPV genotypes increased with the number of HPV genotypes in co-infection. Data represents the percentage of infected women with a) HPV 6 and b) HPV 11 in co-infection of 2, 3, 4, and 5 different genotypes *p < 0.05, **p < 0.01 (single- vs co-infection), z-test