China’s drug regulator approved Merck & Co.’s blockbuster HPV vaccine for use by men, opening a new untapped market for the US drug giant after a rush among women to get the shot lost steam.

China’s National Medical Products Administration cleared Merck’s Gardasil for use to prevent human papillomavirus, also known as HPV, to prevent anal cancer and genital warts among men, according to the company’s official Wechat account