- A 10-year study by Augusta University in Georgia found the shot protected all 1,661 participants from HPV for a decade - The vaccine is commonly used in children aged 9-12 in the US and the UK; it is offered as a three-shot in the US, and a two-shot in the UK - Those who received the shot earlier had a stronger immune response - Experts say they hope these findings will help drive up coverage rates - HPV is the most common sexually-transmitted infection - It can cause genital warts and a host of cancers, even if it is dormant