Fruit flies housed in transparent vials (IMAGE) University of Malta Caption Fruit flies, long used to understand human disease, are also the heroes of long COVID research (Photo by University of Malta/Andrew Gauci Attard). Credit University of Malta Usage Restrictions N/A 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.