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What Is Long Covid?

Acute Covid-19 Infection

This is the NICE term used to describe the signs and symptoms of COVID-19 for up to 4 weeks, regardless of the severity of infection.

Ongoing Symptomatic Covid-19

This is the NICE term used to describe the signs and symptoms of COVID-19 from 4 weeks up to 12 weeks.

This is known as Long Covid.

Post Covid Syndrome

This is the NICE term used to describe the signs and symptoms that develop during or following an infection consistent with COVID-19, continue for more than 12 weeks and are not explained by an alternative diagnosis.

This is Long Covid.

Long Covid is the patient-led term to describe the ongoing, fluctuating symptoms of COVID-19. Different organisations have decided to use slightly different names for the condition.

There has not yet been an agreed consensus for a paediatric Long COVID case definition, but work is underway.


Please share our Long Covid information leaflet to help others access support.

Long Covid Kids
Symptom Prevalence


Our initial rapid survey was completed in January 2021 before Long Covid was widely recognised in children; to provide early evidence of Long Covid symptom prevalence and aid our calls for paediatric Long Covid clinics.


Our second study was published in March 2021: Clinical Characteristics, Activity Levels and Mental Health Problems in Children with Long Covid

Find the latest paediatric Long Covid research from around the globe that supports our early findings.