post-viral fatigue syndrome

Post-viral fatigue syndrome (PVFS) is a condition in which prolonged FATIGUE, reduced ability to perform normal activities, and other symptoms persist after an acute VIRAL INFECTION has resolved. It may occur after infections such as INFLUENZA, glandular fever, COVID-19, or other viral illnesses. Symptoms may include tiredness that is not relieved by rest, difficulty concentrating, disturbed sleep, muscle discomfort, and worsening of symptoms after physical or mental activity. Some people with persistent symptoms may meet criteria for MYALGIC ENCEPHALOMYELITIS.

Post-viral fatigue syndrome is ongoing exhaustion and reduced energy that continues after a person has recovered from a viral infection.

• Persistent fatigue following a viral infection • May occur after illnesses such as influenza or COVID-19 • Symptoms can include tiredness, poor concentration, sleep problems, and muscle discomfort • Rest alone may not fully relieve symptoms • Usually improves gradually, but recovery time varies • Long-lasting cases may overlap with ME/CFS