In the United States, France and Australia, the Covid-19 vaccine can be given to all adolescents over 12 years of age.
On Friday, UK vaccine experts recommended that the vaccine not be given to all children aged 12 to 15, although senior medical officials may take a different approach.
It comes as the teen-run support group Teens for Vaccines says young people around the world are being excluded from discussions that affect their health.
The group, which is based in the US, says it is seeing more people from the UK reaching out for vaccine advice and support on how to talk to parents who are reluctant to receive the vaccine and those opposed to it.
The BBC’s Laura Foster talks to a teen whose parents have prevented her from getting an injection, and finds out more about the work Teens for Vaccines does and what all this could mean for teens in the UK.