@article{bedford_cryptic_2020,
 abstract = {Following its emergence in Wuhan, China, in late November or early December 2019, the SARS-CoV-2 virus has rapidly spread globally. Genome sequencing of SARS-CoV-2 allows reconstruction of its transmission history, although this is contingent on sampling. We have analyzed 453 SARS-CoV-2 genomes collected between 20 February and 15 March 2020 from infected patients in Washington State, USA. We find that most SARS-CoV-2 infections sampled during this time derive from a single introduction in late January or early February 2020 which subsequently spread locally before active community surveillance was implemented.},
 area = {sars-cov-2},
 author = {Bedford, Trevor and Greninger, Alexander L. and Roychoudhury, Pavitra and Starita, Lea M. and Famulare, Michael and Huang, Meei-Li and Nalla, Arun and Pepper, Gregory and Reinhardt, Adam and Xie, Hong and Shrestha, Lasata and Nguyen, Truong N. and Adler, Amanda and Brandstetter, Elisabeth and Cho, Shari and Giroux, Danielle and Han, Peter D. and Fay, Kairsten and Frazar, Chris D. and Ilcisin, Misja and Lacombe, Kirsten and Lee, Jover and Kiavand, Anahita and Richardson, Matthew and Sibley, Thomas R. and Truong, Melissa and Wolf, Caitlin R. and Nickerson, Deborah A. and Rieder, Mark J. and Englund, Janet A. and Investigators‡, The Seattle Flu Study and Hadfield, James and Hodcroft, Emma B. and Huddleston, John and Moncla, Louise H. and Müller, Nicola F. and Neher, Richard A. and Deng, Xianding and Gu, Wei and Federman, Scot and Chiu, Charles and Duchin, Jeff S. and Gautom, Romesh and Melly, Geoff and Hiatt, Brian and Dykema, Philip and Lindquist, Scott and Queen, Krista and Tao, Ying and Uehara, Anna and Tong, Suxiang and MacCannell, Duncan and Armstrong, Gregory L. and Baird, Geoffrey S. and Chu, Helen Y. and Shendure, Jay and Jerome, Keith R.},
 copyright = {Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY).. https://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution license, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.},
 date = {2020-09-10},
 doi = {10.1126/science.abc0523},
 issn = {0036-8075, 1095-9203},
 journal = {Science},
 language = {en},
 month = {September},
 note = {Publisher: American Association for the Advancement of Science
Section: Report},
 pmid = {32913002},
 title = {Cryptic transmission of {SARS}-{CoV}-2 in {Washington} state},
 url = {https://science.sciencemag.org/content/early/2020/09/09/science.abc0523},
 urldate = {2020-09-16},
 year = {2020}
}