Human papillomavirus, or HPV, is a family of viruses that causes warts and in some cases, cancer. The virus is common and contagious, with the CDC estimating around 14 million people becoming infected every year in the United States. The modern HPV vaccine protects against 90 percent of cancer-causing HPV viruses, but very few parents are having their children vaccinated. Why is that? Dr. Kirtly Parker Jones gives the facts on the HPV vaccine, why so few Americans are using it and why it’s important to consider the vaccine for your child.