HTLV-1 virus-like particles (IMAGE) Institute of Science and Technology Austria Caption A viral close-up. HTLV-1 virus-like particles with a close-up view of the building blocks forming the viral lattice. Credit © Nature Structural & Molecular Biology / Obr et al. Usage Restrictions Free to use when reporting about paper. 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.