Impact of COVID-19 Vaccination on Balance Function Among Adolescents: A Long-Term Perspective

Inclusion Criteria: * Adolescence age range 10-17 * received a dose or more of an approved COVID-19 vaccine at least one year before the study enrollment. the ability to complete all assessment measures independently. Exclusion Criteria: 1. vestibular or neurological disorders diagnosed before vaccination. 2. mixed COVID-19 vaccine types. 3. a history of traumatic brain injury. 4. current use of medications that affect balance. 5. documented COVID-19 infection within three months of assessment. 6. physical limitations that prevented them from completing balance testing.