Image 1 (IMAGE) Nanyang Technological University Caption NTU scientists have designed ASO-1, a compound that could help to reduce an overactive immune response without impairing the body's entire immune response. The ASO-1 targets TYK2, an enzyme that plays a key role in regulating the body's immune response and has been associated with severe COVID-19. Credit NTU Singapore Usage Restrictions Use with mandatory credit 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.