TUESDAY, April 12 (HealthDay News) -- Giving doses of human papillomavirus (HPV) vaccine over a longer-than-normal period of time may prove an effective way to make the vaccine available to more females in poorer nations, a new study suggests.
HPV is a transmittable virus and the primary cause of cervical cancer, which kills about 275,000 women worldwide each year. About 88 percent of those deaths occur in developing nations, according to background information in the study.
"Combined with continued strengthening of simple evidence-based screening and treatment approaches, effective HPV vaccine programs could reduce cervical cancer rates in developing countries to the low levels currently observed in many developed countries," said Dr. Kathleen M. Neuzil, of PATH, a nonprofit organization located in Seattle whose stated mission is to improve global health, in a PATH news release. "One challenge to broadly implementing HPV vaccination programs in developing countries will be delivering the currently recommended three doses of vaccine to adolescents within six months (dosing schedules at 0, 2, and 6 months or at 0, 1, and 6 months)."
Even in countries where these dosing schedules are feasible, alternative dosing schedules may offer advantages such as lower cost (the vaccine could be given along with other health services) and increased coverage due to greater convenience for girls and their families or for vaccination teams, the study authors noted.
In this study, the researchers looked at four different dosing schedules used to give HPV vaccine to 903 adolescents girls at 21 schools in Vietnam. The doses were given according to a standard schedule of 0, 2 and 6 months or one of three alternative schedules (0, 3 and 9 months; 0, 6 and 12 months; or 0, 12 and 24 months).
The girls in the alternative dosing schedule groups developed antibody concentration levels similar to the girls in the standard dosing group,
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