And while most infections disappear on their own, without even displaying symptoms, some strains can lead to cancer, notably cervical, which in around 90 per cent of cases is caused by HPV.
It is also linked to penile, anal, throat, head and neck cancer, as well as genital warts.
Between 20, the percentage of people in their 50s who say they have sex at least once a week took about a 10-point plunge for both sexes (women dropped from 43 to 32 percent, and men from 49 to 41 percent). The survey found that only 43 percent of older Americans say they're satisfied with their sex lives (down from 51 percent in 2004), while the percentage who are dissatisfied with their sex lives increased.
The 50-somethings aren't special; most other age groups saw a drop in their frequency of sex, too. Save Money: Get AARP member discounts on travel, shopping and more The chill isn't confined to the bedroom, sadly. Consider that the number of 45 Americans who believe that only married people should have sex has dropped by nearly half in five years-from 41 percent in 1999 to 22 percent in 2009.
Infection with other types of HPV may cause genital warts, skin warts and verrucas, vaginal cancer or vulval cancer (although these types of cancer are rare), anal cancer or cancer of the penis, some cancers of the head and neck and laryngeal papillomas (warts on the voice box or vocal cords).
Studies have already shown that the vaccine protects against HPV infection for around 10 years, although experts expect protection to be for much longer.
For instance, some types of HPV can cause warts or verrucas. In 99 per cent of cases, cervical cancer occurs as a result of a history of infection with high-risk types of HPV. Infection with some high-risk types of HPV can cause abnormal tissue growth as well as other cell changes that can lead to cervical cancer.
"Financial worries tend to seep into all parts of a couple's life together," says Dr.
Pepper Schwartz, a sexologist at the University of Washington in Seattle and AARP's love and relationships ambassador.
In April pharmacy chain Boots UK launched a new private vaccination service from the age of 12 to 44.
For 12 to 14-year-olds it costs £300 for a course of two vaccinations.