NEW YORK, Aug. 12 (UPI) -- Blood tests are ineffective for diagnosing long COVID -- a constellation of long-term symptoms such as chronic pain, brain fog, shortness of breath and intense fatigue, a new study shows. Without a clear tool to detect and treat the lingering illness, it remains "a major public health burden," researchers noted, affecting millions of people worldwide and significantly altering quality of life. Advertisement The new study, funded by the National Institutes of Health

Tag-uri: Coronavirus