@article{mavian_sampling_2020,
 abstract = {There is obvious interest in gaining insights into the epidemiology and evolution of the virus that has recently emerged in humans as the cause of the coronavirus disease 2019 (COVID-19) pandemic. The recent paper by Forster et al. (1) analyzed 160 severe acute respiratory syndrome coronavirus (SARS-CoV-2) full genomes available (https://www.gisaid.org/) in early March 2020. The central claim is the identification of three main SARS-CoV-2 types, named A, B, and C, circulating in different proportions among Europeans and Americans (types A and C) and East Asians (type B). According to a median-joining network analysis, variant A is proposed to be the ancestral type because it links to the sequence of a coronavirus from bats, used as an outgroup to trace the ancestral origin of the human strains. The authors further suggest that the “ancestral Wuhan B-type virus is immunologically or environmentally adapted to a large section of the East Asian population, and may need to mutate to overcome resistance outside...},
 area = {virus_evolution},
 author = {Mavian, Carla and Pond, Sergei Kosakovsky and Marini, Simone and Magalis, Brittany Rife and Vandamme, Anne-Mieke and Dellicour, Simon and Scarpino, Samuel V. and Houldcroft, Charlotte and Villabona-Arenas, Julian and Paisie, Taylor K. and Trovão, Nídia S. and Boucher, Christina and Zhang, Yun and Scheuermann, Richard H. and Gascuel, Olivier and Lam, Tommy Tsan-Yuk and Suchard, Marc A. and Abecasis, Ana and Wilkinson, Eduan and Oliveira, Tulio de and Bento, Ana I. and Schmidt, Heiko A. and Martin, Darren and Hadfield, James and Faria, Nuno and Grubaugh, Nathan D. and Neher, Richard A. and Baele, Guy and Lemey, Philippe and Stadler, Tanja and Albert, Jan and Crandall, Keith A. and Leitner, Thomas and Stamatakis, Alexandros and Prosperi, Mattia and Salemi, Marco},
 copyright = {Copyright © 2020 the Author(s). Published by PNAS.. https://creativecommons.org/licenses/by/4.0/This open access article is distributed under Creative Commons Attribution License 4.0 (CC BY).},
 date = {2020-05-06},
 doi = {10.1073/pnas.2007295117},
 issn = {0027-8424, 1091-6490},
 journal = {Proceedings of the National Academy of Sciences},
 language = {en},
 month = {May},
 pmid = {32381734},
 title = {Sampling bias and incorrect rooting make phylogenetic network tracing of {SARS}-{COV}-2 infections unreliable},
 url = {https://www.pnas.org/content/early/2020/05/06/2007295117},
 urldate = {2020-05-06},
 year = {2020}
}