US study shows difficulty of finding lab test for long Covid: ‘The hunt will go on’

Four-year study of patients finds markedly few' differences in test results between people who have long Covid and those who do not

A new study by the National Institutes of Health (NIH) highlights the difficulty of finding a lab test for long Covid - a novel condition that encompasses dozens of symptoms and is currently considered a diagnosis of exclusion".

Long Covid's most common symptoms include brain fog, fatigue and heart palpitations, which can change over time and be disabling when severe. Approximately one in 20 adults reported persistent symptoms of Covid, as of June 2024.