Long COVID syndrome: An unfolding enigma

Area of Science:

• Infectious Diseases
• Public Health
• Immunology

Background:

• Post-acute sequelae of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) disease, known as long COVID syndrome, presents a significant global health challenge.
• Symptoms manifest in patients who experienced COVID-19, persisting beyond four weeks and often lasting over three months, irrespective of initial disease severity.

Purpose of the Study:

• To outline the risk factors, clinical manifestations, diagnostic considerations, and preventive measures for long COVID syndrome.
• To highlight emerging biomarkers and the importance of rehabilitation in managing long COVID.

Main Methods:

• Review of existing literature on long COVID syndrome, including prevalence, risk factors, and symptoms.
• Identification of potential diagnostic biomarkers and preventive strategies such as vaccination and antiviral therapies.

Main Results:

• Key risk factors include older age, female gender, comorbidities, severe acute illness, high viral load, and specific viral reactivations.
• Common symptoms encompass fatigue, cognitive impairment, respiratory issues, anosmia, and gastrointestinal problems. Emerging biomarkers include reduced complement C7 and a two-gene signature (FYN and SARS-CoV-2 antisense RNA).

Conclusions:

• Long COVID syndrome is a multi-system condition with diverse symptoms and identifiable risk factors.
• Vaccination and early antiviral treatment may prevent long COVID, while physical and mental rehabilitation are crucial for patient management. Further research and clinical trials are ongoing.