Pharmaceutical An analysis of cervical-cancer vaccine has shown that Merck & Co's (NYSE: MRK) Gardasil (human papillomavirus quadrivalent [types 6, 11, 16 and 18] Vaccine, Recombinant), is more cost-effective than Cervarix (human papillomavirus bivalent [types 16 and 18] vaccine, recombinant), a rival product from GlaxoSmithKline (LSE: GSK). The review was conducted by researchers from the UK's Health Protection Agency, led by Mark Jit, which was posted on the British Medical Journal web site. 29 September 2011