Blood and urine 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.

A study has identified four predictive factors of Post Acute Sequelae of COVID-19 (PASC), often called long COVID. These 'PASC factors' can be identified at the initial point of COVID-19 diagnosis ...

Symptoms of COVID-19 persist or recur months after diagnosis for more than a third of all people who get the illness, a new study finds, potentially pushing the number of so-called long COVID ...

Study identifies elevated serologic responses and memory CD8+ T cell clonal expansion as key markers of Long COVID, offering insights into its pathology and potential diagnostic approaches.

The study authors say that while a symptom scale like this one may be used to diagnose people with long Covid down the road, this one shouldn’t be, because it’s just a first attempt and needs ...

Long Covid continues to evade a clear diagnostic test, researchers reported in a study published Monday in the Annals of Internal Medicine. The findings are part of the National Institute of ...

This 2-year-long longitudinal study was thereby able to reveal protein biomarkers useful in long-COVID diagnosis and some potential mechanisms by which the condition debilitates survivors.

The new study suggests avenues for future research on ways to prevent or combat long-COVID. Antivirals might help ward off long-COVID, given the signs of COVID-19 or Epstein Barr virus in patients ...

More information: Rick DeVoss et al, Healthcare utilization patterns before and after a long COVID diagnosis: a case-control study, BMC Public Health (2025). DOI: 10.1186/s12889-025-21393-4.

What a long COVID diagnosis means when your doctor knows little more than Google ... Vaccines reduce risk of long Covid by just 15 percent, study finds “That’s just part of aging”: ...

Around two-thirds of the COVID-19 cohort experienced symptoms of long COVID, defined as a symptom lasting longer than 12 weeks beyond initial date of diagnosis. Among those experiencing long COVID ...