The vaccine is very safe.
It was tested on more than 20,000 females in 33 countries and 4000 males in 18 countries before it was approved for use. It is approved for females aged 9 to 45 years and males 9 to 26 years.
Over 205 million doses of the Gardasil vaccine have been distributed worldwide as of 31 December 2015. The vaccine's safety is still (and will always be) closely monitored by scientific organisations around the world including the World Health Organization.
Some people might have mild side effects when they get the vaccine, such as pain, redness and/or swelling at the site of injection.
These usually pass quickly.
More severe side effects such as anaphylactic (allergic) reaction are extremely rare. They normally only happen if you're allergic to an ingredient in the vaccine.
After having the vaccine, your child will be monitored for 15 minutes to make sure they don't have an allergic reaction. If an allergic reaction does occur, it can be treated quickly and successfully.
More information on side effects