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HPV Immunization
Parent resource
A common virus — and a proven way to prevent it
Human papillomavirus (HPV) is a common virus that can cause several types of cancer and other diseases in both females and males.
The HPV vaccine significantly reduces the risk of HPV infection and HPV-related cancers. It is the only vaccine currently available that directly prevents multiple types of cancer.
Why it matters
What HPV can cause
In females, HPV is responsible for
- Approximately 70% of cervical cancers
- About 90% of anal cancers
- About 90% of genital warts
- A substantial percentage of vaginal, vulvar, and oropharyngeal cancers
In males, HPV is responsible for
- About 90% of anal cancers
- About 90% of anogenital warts
- A substantial percentage of penile and oropharyngeal cancers
The vaccine
How the HPV vaccine protects your child
The vaccine is most effective when administered starting at age 9, when it produces a strong and long-lasting immune response.
- Children who begin the vaccine series before age 15 require 2 doses.
- Individuals who begin the series at age 15 or older require 3 doses.
For maximum protection, the vaccine should be given before exposure to HPV through sexual activity.
What the HPV vaccine has not been shown to do
Backed by extensive research, HPV vaccination has not been shown to:
- Cause cancer
- Cause neurologic or seizure disorders
- Weaken the immune system
- Impair fertility
Possible side effects
Possible side effects are generally mild and may include:
- Pain, redness, or swelling at the injection site
- Dizziness or fainting
- Mild fever
- Headaches or body aches
These side effects are similar to those seen with many other routinely recommended vaccines.
A strong safety record
More than 15 years of monitoring have shown the HPV vaccine to have an excellent safety record. Please consider protecting your child against HPV-related cancers and diseases through vaccination.