For thousands still battling long-term COVID-19 symptoms, daily life is marked by dizziness, brain fog, and constant exhaustion. Simple activities such as reading or talking can trigger overwhelming fatigue, leaving many unable to function normally.

A recent Yale University study found that nearly half of people with lingering post-COVID symptoms meet the criteria for myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS), a debilitating condition affecting the body’s neurological and immune systems.

Once dismissed as mere tiredness, ME/CFS is now recognized as a serious disorder that causes extreme fatigue even after minimal exertion. It disrupts energy production, concentration, and the body’s ability to recover.

While the pandemic’s early focus was on acute infections, a quieter crisis has persisted — patients who never fully recovered. Months after testing negative, many continue to suffer from pain, cognitive difficulties, and severe exhaustion.

Yale researchers have discovered biological similarities between long COVID and ME/CFS, including immune system irregularities, mitochondrial dysfunction, and disruptions in the autonomic nervous system. These issues may explain symptoms such as palpitations, dizziness, and brain fog.

Scientific evidence now confirms that ME/CFS is not psychological. Imaging and blood tests reveal measurable physiological changes, though patients still face skepticism from doctors and employers due to their outwardly healthy appearance.

Advocates and researchers are calling for more funding, better awareness, and workplace accommodations. Patient groups share coping methods like pacing and hydration, while scientists hope that studying long COVID will lead to long-awaited breakthroughs in diagnosis and treatment for ME/CFS.