Freya said Harmonie, who is now 12, “had gone from babbling and trying to climb out of her cot to a still and silent little baby” within a day.
After showing signs of a cold “a small purple mark appeared on her nose and within minutes it had spread across her whole body”, she said.
“I knew straight away what it was.”
Freya added: “Meningitis moves so fast.
“It can take hold in hours, which is why it’s so important that parents know the signs and act immediately if something feels wrong, even if your child has just been seen by a doctor.
“Harmonie is incredible. She swims, she does gymnastics, she goes to school, she dances and she’s won awards but every day she has to find her own way of doing things that come easily to other children.”
Two doses of the MenB vaccine are required to be administered at least 28 days apart.
Students can get them from local pharmacies, booked via the NHS website.