There are three HPV vaccines available: Gardasil, Gardasil 9, and Cervarix. Gardasil protects against four types of HPV (6, 11, 16, and 18), while Gardasil 9 covers nine types (6, 11, 16, 18, 31, 33, 45, 52, and 58). Cervarix targets two types (16 and 18). Gardasil 9 is currently the most widely used due to its broader range of protection.