Figure 2.

Frequency of co-infection according to HPV species. Most common genotypes were grouped in four species (X axis): A5 (HPV51 and 82), A6 (HPV53, 66 and 56), A7 (HPV18, 39, 45 and 68) and A9 (HPV16, 58, 31, 52, 33 and 35). Standard deviation is plotted for each species. Y axis: percentage of co-infection.