New data from an extended follow-up study show that GlaxoSmithKline PLC.’s cervical cancer candidate vaccine, Cervarix, generates sustained high levels of neutralizing antibodies against the two most common cervical cancer-causing virus types for up to 6.4 years. This is the longest duration of sustained neutralising antibody levels reported against both virus types HPV 16 and 18 with a cervical cancer vaccine to date. Experts believe that neutralizing antibodies are essential for protection against cervical cancer.