A nurse shows human papillomavirus (HPV) vaccines developed by Chinese researchers at the Provincial Maternity and Child Healthcare Hospital in Wuhan, central China's Hubei Province, May 18, 2020. (Photo: Xinhua)

China will expand the free HPV vaccination policy to cover more people, and step up efforts to gradually address the shortage of HPV vaccine supply to meet demand, Wang Linhong, the chief expert of chronic and non-communicable disease control at China's CDC, said at a press conference on Monday.