@misc{indiciae8245a56cd483,
  title = {Delta spike P681R mutation enhances SARS-CoV-2 fitness over Alpha variant},
  author = {Liu, Y. and Liu, J. and Johnson, B. A. and Xia, H. and Ku, Z. and Schindewolf, C. and Widen, S. G. and An, Z. and Weaver, S. and Menachery, V. D. and Xie, X. and Shi, P.-Y.},
  year = {2021},
  doi = {10.1101/2021.08.12.456173},
  url = {https://www.biorxiv.org/content/10.1101/2021.08.12.456173v1},
  note = {Source identifier: 10.1101/2021.08.12.456173}
}