Dizziness, brain fog, and disorientation are now part of daily life for thousands living with long-term COVID-19 symptoms. For many, simple tasks like reading or holding a conversation lead to exhaustion so intense it feels like collapse. A Yale University study found that nearly half of those with lingering post-COVID symptoms meet the criteria for myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS). ME/CFS is a serious neurological and immune disorder that leaves patients drained after minimal effort. Once dismissed as “just being tired,” it’s now recognized as a complex illness involving widespread dysfunction across the body.When the pandemic began, attention centered on acute infections. But as the emergency eased, a quieter crisis surfaced—people who never fully recovered. Months after testing negative, many continued to suffer unrelenting fatigue, muscle pain, and cognitive decline. Researchers at Yale found striking biological overlaps between long COVID and ME/CFS. Both show immune dysregulation, mitochondrial malfunction, and problems in the autonomic nervous system, which regulates heart rate, blood pressure, and breathing. These abnormalities may explain the dizziness, palpitations, and brain fog that define the condition.