A 14-year-old girl who was given a jab to protect her from cervical cancer died from a tumour in her chest and not because of a reaction to the injection.
Natalie Morton died in hospital just a couple of hours after being given the injection at her school in Coventry.
But an investigation found the jab was not thought to have been the cause of her death.
Natalie did not know about her tumour but a doctor said it was "so severe death could have arisen at any point".
More than a million young girls have been given the cervical cancer jab to help stop them getting the illness when they're older.
Doctors say the injection's safe and girls shouldn't worry about it.
Every year around 2,800 women are diagnosed with cervical cancer in Britain, but if it is caught early it is possible to be cured.