A teenager from Dorset has told the Covid-19 inquiry her ongoing symptoms often leave her feeling "left out".
The inquiry hopes to understand the ongoing impact of the pandemic and is expected to last four weeks.
Some witnesses described having to stay at home and miss school because of living with vulnerable family members
Others, like 16-year-old Molly from Weymouth, said they were still experiencing symptoms of Long Covid, where the infection's symptoms continue for more than 12 weeks.
Before being diagnosed, Molly said she used to be "really active and sporty".
"Now I live with on-going symptoms that stop me from doing the things that most teenagers can," she said.
Molly spent long periods in hospital and said she was forced to miss out on most of her secondary education.
"I often feel left out because my friends have moved on and I can't keep up."
Molly said she thought it was "very important" that children and young people gave evidence to the inquiry.
"Too often children like me have felt abandoned and failed, our struggles minimised and ignored," she said.
"I want people to understand how much this has affected young people too... and children like me won't be overlooked in the future."
Sammie McFarland, from Weymouth, is the CEO and co-founder of Long Covid Kids, which represents more than 11,000 families in the UK.
She said she hoped to see "rock-solid action" from the government, as well as "a formal apology to children and young people who have been completely and utterly overlooked".
The government has said it is committed to learning lessons from the inquiry.