The percentage of teenagers who were up to date on their human papillomavirus (HPV) vaccines has fallen dramatically since 2020, according to new federal data released Thursday.
The Centers for Disease Control and Prevention (CDC) currently recommends children from ages 11 to 12 receive two doses of the HPV vaccine, given six to 12 months apart, although children can get the vaccine starting at age 9.
Anybody under age 26 can get the HPV vaccine if they have not been fully vaccinated, according to the CDC. People ages 15 to 26 years old who have not received the HPV vaccine typically need three doses to be fully vaccinated.
MORE: HPV vaccine can reduce risk of multiple cancers in men, new study suggestsThe CDC's report looked at data from the 2023 National Immunization Survey -Teen, a group of phone surveys used to monitor vaccination coverage among teenagers. Similar ones are conducted for children and adults.
The survey looked at trends in coverage by birth year, and trends in coverage by eligibility for the Vaccines for Children (VFC) program, a federally funded program that provides vaccines to children whose parents or guardians may not be able to afford them.
The program found that vaccination coverage for vaccines including tetanus, diphtheria, and acellular pertussis vaccine (Tdap), as well as for the meningococcal ACWY vaccine, was generally stable during the COVID-19 pandemic.
However, there was a notable decrease in the percentage of adolescents who were up to date with HPV vaccination by age 13 among those born in 2010 -- who would have turned 13 in 2023 -- compared with those born in 2007, who would have turned 13 in 2020.
For teens who were born in 2007, 52.8% of those who were not eligible for VFC were up to date on their HPV vaccines by age 13. By comparison, only 48.7% of non-eligible teens born in 2010 were up to date by age 13.
Among teens born in 2007 who were VFC eligible, 53% were up to date by age 13. However, only 42.7% of eligible teens born in 2010 were up to date by age 13.
"The decline in the percentage of VFC- eligible adolescents who are HPV [up to date] could signal a change in accessibility to vaccination through the VFC program, a change that needs further exploration," the report read. "This possibility under-scores the importance of ongoing efforts to ensure equitable access to vaccination services for all children and adolescents."
Overall, 2023 coverage was similar to 2022, with 76.8% of all teens between ages 13 and 17 receiving at least one dose of the HPV vaccine compared to 76.0% in 2022, the report found.
However, only 61.4% of all teenagers in this age group were updated on their HPV vaccines, down from 64.6% in 2022.
MORE: What to know about self-swabbing for HPV after FDA approves new kitsHPV is a very common STI that infects about 13 million Americans each year, according to the CDC. Nearly everyone will contract HPV at some point in their lives, the CDC says.
There are more than 100 types of HPV, and most HPV infections clear up on their own within two years.
About 10% of infections last longer and can put individuals at risk for some cancers including cervix, vaginal and vulvar cancer; penile cancer; anal cancer; and oropharyngeal cancer, which is a cancer of the back of the throat, according to the CDC.
Every year, HPV causes about 37,000 cases of cancer in both men and women in the U.S., according to the federal health agency. However, HPV vaccination can prevent more than 90% of HPV cancers when given at the recommended ages, according to the American Cancer Society.
"Health care providers should make strong recommendations for all routine vaccines and verify if adolescents, particularly those eligible for the VFC program, are up to date with all recommended vaccines," the report stated.