Today, Merck announced that Health Canada has approved GARDASIL(R) (Human Papillomavirus Quadrivalent (Types 6, 11, 16, and 18) Recombinant Vaccine) for boys and men nine through 26 years of age for the prevention of infection caused by HPV types 6, 11, 16, and 18 and genital warts caused by HPV types 6 and 11.