Pathological sequelae of long-haul COVID

Area of Science:

• Immunology
• Virology
• Neurology
• Pathophysiology

Background:

• Successive waves of coronavirus disease 2019 (COVID-19) and emerging variants continue to impact global health.
• A significant number of individuals experience persistent, debilitating sequelae post-COVID-19 infection, termed post-COVID-19 syndrome or long-haul COVID.
• The clinical manifestations are diverse, including fatigue, dyspnea, cognitive deficits, and neuropsychiatric issues, affecting multiple organ systems.

Purpose of the Study:

• To review the organ-specific sequelae associated with post-COVID-19 syndromes.
• To examine the current understanding of the underlying pathophysiological mechanisms.
• To propose diagnostic strategies for this complex condition.

Main Methods:

• Literature review of organ-specific sequelae.
• Analysis of proposed pathophysiological mechanisms including persistent inflammation, autoimmunity, and viral reservoirs.
• Synthesis of current knowledge to inform diagnostic approaches.

Main Results:

• Post-COVID-19 syndrome presents with a wide range of organ-specific complications.
• Key proposed pathophysiological mechanisms include sustained inflammation, virus-induced autoimmunity, and potential viral persistence.
• The heterogeneity of the disorder complicates diagnosis and management.

Conclusions:

• Post-COVID-19 syndrome is a complex, multi-system disorder with poorly understood mechanisms.
• Persistent inflammation, autoimmunity, and viral reservoirs are implicated in its pathogenesis.
• Improved diagnostic strategies are needed to address the millions affected worldwide.