Which of the following vaccines is indicated for both males and females between ages 9 and 45?

The Gardasil vaccine is specifically indicated for both males and females aged 9 to 45 because it protects against human papillomavirus (HPV), which is associated with several cancers, including cervical cancer in females and other anogenital cancers in both genders. The vaccine is designed to prevent the most common types of HPV that cause these cancers and genital warts, making it relevant for both sexes within the specified age range.

In contrast, the meningococcal vaccine primarily targets bacterial infections caused by Neisseria meningitidis and is typically recommended for certain high-risk groups and adolescents, rather than being universally indicated for all individuals between ages 9 and 45. The pneumococcal vaccine focuses on preventing pneumonia and other infections caused by Streptococcus pneumoniae, also with more specific recommendations. The influenza vaccine is recommended annually but does not have the same targeted cancer prevention that Gardasil offers. Thus, Gardasil stands out as the vaccine specifically indicated for both males and females in that age range.