Understanding Long COVID: When the Illness Is Gone but the Body Has Yet to Recover

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Understanding Long COVID: When the Illness Is Gone but the Body Has Yet to Recover
Bangkok Hospital Phitsanulok

Although the treatment and control of COVID-19 have significantly improved—particularly following widespread vaccination—many individuals continue to experience lingering symptoms even after they have officially recovered from the infection. These persistent symptoms are commonly known as Long COVID or Post-COVID Syndrome, a condition that has emerged as a new health challenge in the post-pandemic world.

What Is Long COVID?

Long COVID refers to a range of symptoms that persist well after the acute phase of COVID-19 has passed. These symptoms may vary widely in type and severity and can last for several weeks or even months following recovery from the initial infection. For some, the impact of COVID-19 appears to linger, leaving them with the feeling that their body has not fully returned to normal—even long after testing negative.

Common Symptoms of Long COVID

Symptoms of Long COVID can differ from person to person. However, several manifestations are frequently reported, including:

  1. Chronic Fatigue
    Many individuals report ongoing fatigue that does not improve with rest. They may feel persistently tired, lacking the energy to carry out routine daily activities, even with adequate sleep.

  2. Shortness of Breath and Sore Throat
    Difficulty breathing or a lingering sore throat are common issues that may persist after the virus has cleared, often affecting quality of life.

  3. Headaches and Body Aches
    Some people continue to suffer from recurring or constant headaches and musculoskeletal pain long after the initial infection has subsided.

  4. Memory Issues and Difficulty Concentrating (Brain Fog)
    Referred to as “brain fog,” this symptom includes forgetfulness, trouble focusing, and slower cognitive processing—even in the absence of clear physical symptoms.