In the article titled “Are the Two Human Papillomavirus Vaccines Really Similar? A Systematic Review of Available Evidence: Efficacy of the Two Vaccines against HPV” [1], there was an error in the Discussion section, where “Our systematic review highlights that, for precancerous lesions (CIN), the only available proxy of cervical cancer and heterogeneity among pooled studies is substantial” should be changed to “Our systematic review highlights that, for precancerous lesions (CIN), the only available proxy of cervical cancer, heterogeneity among pooled studies is substantial.” In addition, there was an error in Table 3. The corrected table is as follows.