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The distribution of HPV genotypes in different age groups. Each bar represents the number of infections due to corresponding HPV genotypes. Black, yellow, pink, red, blue, green and violet indicate the numbers of infections in the <20, 20–29, 30–39, 40–49, 50–59, 60–69 and >70 years groups for the corresponding genotypes, respectively. (A) High-risk HPV infection. (B) Low-risk HPV infection.
