Many older women infected with the human papillomavirus (HPV) in their youth may not "clear" it from the body as completely as once thought, a new study suggests.
The research hints that HPV infection in older women is often the reactivation of a strain picked up years ago, rather than a newly acquired sexually transmitted infection.
The study authors also found that HPV may be difficult to detect in the body more than one to two years after the initial infection.
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