Australian study to protect against the HPV virus reveals decreased high-grade abnormalities in children under 18
The first evidence is that immunization programs at the national level for young women against HPV, the virus that causes cervical cancer may reduce the number of people contracting the disease.
A study conducted in Australia, one of the first countries to introduce vaccination, showed a decrease in high-grade abnormalities of the cervix - changes in cervical cells that can be precursor to cancer.
Australia introduced a national HPV (human papillomavirus) vaccination of women aged 12 to 26, 2007.
Although it will take many years to know if vaccination programs may reduce the number of cervical cancers in the population, Australian scientists were able to analyze the results of its evaluation program for determine if there was some decrease in the number of young women with abnormal changes in cells that are precursors to cancer.
published in the medical journal The Lancet, show that the proportion of girls aged 17 and under with high-grade abnormalities was reduced by almost half, from 0.80% to 0, 42%.
But there was no decrease in the number of women with cervical abnormalities that were older than 17 years. This is not surprising since the vaccine is known to be more effective if given to girls before they become sexually active.
The conclusion, say the authors, "reinforces the relevance of targeting prophylactic HPV vaccines for preadolescent girls."
The results were met with international interest.
"Although it is probably due to the effects of the vaccination program, data analysis, linking women's history to discredit their vaccination history will be required to demonstrate that the decrease is due only vaccination rather than other factors. "
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