Long COVID Roundup

Studies Associate Long COVID With Cognitive, Neurologic, and Academic Outcomes

Edited by:
Anthony Calabro, MA

Key Highlights

  • Long COVID in children and adolescents was associated with worse academic performance, increased difficulty paying attention, and reduced peer interaction compared with those without long COVID.
  • Post–COVID-19 condition is characterized by persistent neurologic and psychiatric symptoms, including cognitive impairment, fatigue, and sleep disturbance, which may persist for 12 to 24 months or longer.
  • Severe acute COVID-19 illness, particularly cases requiring ≥7 days bedridden, was associated with impaired subjective cognitive function up to 32 months after diagnosis.
  • Fatigue, memory impairment, and cognitive dysfunction were among the most common long-term neurologic symptoms reported in COVID-19 survivors, with substantial prevalence across studies.

Pediatric Long COVID Linked to Worse Grades, Attention Difficulties1

A cross-sectional analysis of the NIH-funded RECOVER-Pediatrics observational cohort found that long COVID in children and adolescents was associated with worse school-related functional outcomes. The study included 1976 participants aged 6 to 17 years who were enrolled at least 90 days after SARS-CoV-2 infection, with long COVID defined using age-specific symptom-based research indices. Among school-age children, 18% with long COVID had worsened grades vs 7% without long COVID (adjusted risk ratio [RR], 2.18; 95% CI, 1.15-4.11). Among adolescents, 29% vs 11% had worsened grades (adjusted RR, 2.39; 95% CI, 1.86-3.06).

Long COVID was also associated with difficulty paying attention and reduced peer engagement in both age groups. Among school-age children, moderate or severe difficulty paying attention was reported in 38% with long COVID vs 14% without (adjusted RR, 2.52; 95% CI, 1.63-3.89), and limited fun with friends in 28% vs 9% (adjusted RR, 2.77; 95% CI, 1.56-4.94). Among adolescents, difficulty paying attention was reported in 37% vs 11% (adjusted RR, 3.26; 95% CI, 2.62-4.05), limited fun with friends in 43% vs 21% (adjusted RR, 1.95; 95% CI, 1.65-2.31), and having or obtaining an individualized education program in 27% vs 15% (adjusted RR, 1.66; 95% CI, 1.32-2.07). These findings indicate that pediatric long COVID is associated with adverse academic, attentional, and social outcomes.

Post-COVID Condition Review Highlights Neurologic, Psychiatric Symptoms2

A review of post–COVID-19 condition (PCC), also known as long COVID, found that persistent neurologic and psychiatric symptoms are common following acute SARS-CoV-2 infection. PCC, estimated to affect approximately 6% of individuals with prior COVID-19, includes symptoms such as cognitive impairment, headache, fatigue, sleep disturbance, dysautonomia, anxiety, and depression. Evidence from systematic reviews and cohort studies suggests that key symptoms, particularly fatigue, cognitive dysfunction, and sleep disturbances, may persist for 12 to 24 months or longer and can affect daily functioning and quality of life.

Proposed mechanisms include viral persistence, immune dysregulation, neuroinflammation, latent herpesvirus reactivation, microvascular injury, gut-brain axis disruption, and structural and functional brain changes. The review highlights a bidirectional interaction between neurologic and psychiatric symptoms, with overlapping clinical manifestations. Management is largely supportive and multidisciplinary, including rehabilitation, pacing strategies, cognitive behavioral therapy, and symptom-targeted pharmacologic treatment. Ongoing trials are evaluating pharmacologic, immunologic, and microbiome-based interventions.

Severe Acute COVID-19 Associated With Long-Term Subjective Cognitive Impairment3

An observational study found that severe acute COVID-19 was associated with impaired subjective cognitive function up to 32 months after diagnosis. The study included 153,841 adults from 5 population-based cohorts across 4 European countries, of whom 31,359 reported prior COVID-19 infection. Overall, COVID-19 diagnosis was not significantly associated with impaired cognitive function compared with no diagnosis (prevalence ratio [PR], 1.30; 95% CI, 0.98-1.71).

However, illness severity was associated with long-term outcomes. Individuals bedridden for 7 days or longer had a higher prevalence of impaired cognitive function compared with those never diagnosed (PR, 2.59; 95% CI, 1.55-4.33). Those bedridden for 1 to 6 days had intermediate estimates (PR, 1.38; 95% CI, 0.96-1.99), whereas individuals who were not bedridden had a lower prevalence than those without COVID-19 (PR, 0.89; 95% CI, 0.80-1.00). Longitudinal analyses demonstrated a decline in cognitive function from pre- to postdiagnosis among individuals with more severe illness (P < .0001), supporting an association between acute illness severity and persistent cognitive symptoms.

Meta-analysis Finds Persistent Fatigue, Cognitive Symptoms After COVID-194

A systematic review and meta-analysis of more than 4 million patients found that neurologic and neuropsychiatric symptoms commonly persist for at least 6 months after COVID-19. Fatigue was the most prevalent symptom, affecting 43.3% of patients (95% CI, 36.1%-50.9%), followed by memory disorders (27.8%; 95% CI, 20.1%-37.1%) and cognitive impairment (27.1%; 95% CI, 20.4%-34.9%). Other frequently reported symptoms included sleep disturbances (24.4%), concentration impairment (23.8%), headache (20.3%), and dizziness (16.0%).

Psychiatric symptoms were also reported, including stress (15.9%), depression (14.0%), and anxiety (13.2%). Substantial heterogeneity was observed across studies. Meta-regression analyses identified higher prevalence of stress, fatigue, and headache among female patients, as well as associations between higher body mass index and increased stress and concentration impairment. These findings indicate that long-term neurologic and psychiatric symptoms are common after COVID-19 and may contribute to ongoing patient burden.

References

  1. Reeder HT, Kleinman LC, Stockwell MS, et al; on behalf of the RECOVER-Pediatrics Consortium. School difficulties and long COVID in children and adolescents. Acad Pediatr. Published online 2026.
  2. Matthews R, Alam A, Bullmore E, Michael BD. Understanding the long-term neurological effects of SARS-CoV-2 infection. Nat Rev Neurol. Published online April 13, 2026. doi:10.1038/s41582-026-01205-y
  3. Magnúsdóttir I, Nygaard AB, Hoffart A, et al. Acute COVID-19 severity and impaired cognitive function up to 32 months after diagnosis: an observational study. BMC Med. Published online April 11, 2026.
  4. Elboraay T, Ebada MA, Elsayed M, et al. Long-term neurological and cognitive impact of COVID-19: a systematic review and meta-analysis in over 4 million patients. BMC Neurol. 2025;25:250.