The HPV vaccine isn’t just for women. Why it matters for boys and men, according to a doctor - CNN

A vaccine long framed as protection against cervical cancer in women is now showing clear benefits for men.

Boys and young men who received the human papilloma virus, or HPV, vaccine had about half the risk of developing related cancers compared with those who were unvaccinated, according to a large new study published in JAMA Oncology.

That’s why parents and young men should know more about what HPV is and what cancers it’s linked to. Why is the HPV vaccine important for boys and young men, and when should they receive it? What should parents be considering as they debate whether to give their children this vaccine?

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To help with these questions, I spoke with CNN wellness expert Dr. Leana Wen. Wen is an emergency physician and adjunct associate professor at George Washington University. She previously was Baltimore’s health commissioner.

CNN: What is HPV, and how common is it in boys and men?

Dr. Leana Wen: HPV is an extremely common virus transmitted through intimate skin-to-skin contact. The vast majority of those who are sexually active will be exposed to it at some point in their lives.

This applies to both men and women. According to the National Cancer Institute, nearly all sexually active people are infected with HPV within months to a few years of starting sexual activity. About half of these infections are with a high-risk HPV type that increases the likelihood of developing cancers. Most infections go away on their own as the immune system clears them, but some persist and can cause cellular changes that can become cancerous over time.

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CNN: What types of cancers are linked to HPV?

Wen: HPV is associated with a range of cancers in both men and women. In women, the most well-known is cervical cancer, but HPV can also cause cancers of the vagina and vulva. In men, HPV is linked to cancers of the penis, anus and the head and neck.

Over 90% of anal cancer is caused by HPV. Oropharyngeal cancer, also called throat cancer, is highly associated with HPV as well, with about 70% attributed to HPV. And more than 60% of penile cancer is caused by HPV.

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CNN: What did this new study find about HPV vaccination in boys and young men?

Wen: This study included a global database of more than 615,00 males ages 9 to 26 who received the nonavalent HPV vaccine and over 2 million who did not. After adjusting the groups to make them comparable, the researchers analyzed about half a million individuals in each group.

They found that men who were vaccinated had a significantly lower risk of developing HPV-related cancers. Overall, vaccination was associated with about a 46% reduction in risk, meaning those who received the vaccine had roughly half the risk compared with those who were unvaccinated.

The benefit was seen across different groups studied. Those vaccinated between ages 9 and 14 had about a 42% lower risk, while those vaccinated between 15 and 26 had about a 50% lower risk.

CNN: Why has HPV vaccination historically been emphasized more for girls and women?

Wen: The initial focus of the HPV vaccine was driven by the clear and direct link between HPV and cervical cancer, which is a major global health issue. According to the World Health Organization, cervical cancer is the fourth most common cancer in women globally, causing more than 660,000 new cases and around 350,000 deaths in 2022.

Early clinical trials and public health campaigns prioritized preventing this specific cancer, so vaccination programs were first rolled out for girls. Over time, as more evidence accumulated about the burden of HPV-related disease in men, recommendations have expanded to include boys. However, public perception has lagged behind the science, and many people still think of this vaccine as primarily targeted for females.

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CNN: At what age should boys receive the HPV vaccine?

Wen: The US Centers for Disease Control and Prevention recommends routine vaccination of preteens at 11 or 12 years old. It states that the vaccination series can be started at as early as age 9. The HPV vaccine can be given at the same time as other vaccines.