Four years after getting the vaccine, 94 percent of women were protected from infection with the virus that causes most cervical cancers and none had developed worrisome precancerous conditions, a study showed.
"We're thrilled about these results. The immune responses seem to be really long-lasting," said Dr. Eliav Barr, who leads development of the vaccine for Merck & Co. The company plans to seek U.S. Food and Drug Administration approval next year for an expanded version of the vaccine that also could be used to prevent genital warts in both women and men.
The new study was funded by Merck and led by University of Washington researchers who presented results Monday at a meeting of the American Society for Microbiology.
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