SFTS Virus in a Test Tube (IMAGE) University of Southern California Caption USC researcher Younho Choi, holds up a sample of the virus transmitted by the Asian longhorned tick. Thursday, Jan. 3, 2019. Credit (USC/Gus Ruelas) Usage Restrictions None License Licensed 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.