News Package (VIDEO) National Jewish Health This video is under embargo. Please login to access this video. Caption A new study by researchers at National Jewish Health published in the American Journal of Respiratory and Critical Care Medicine is shedding light on the cause behind long-term COVID-19 symptoms that will help experts begin to develop treatments. Credit National Jewish Health Usage Restrictions All multimedia is available for free and unrestricted media use with courtesy to National Jewish Health. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.