Influenza resources

The Nextstrain team maintains datasets and other tools for analyzing a variety of influenza viruses. We track the evolution of seasonal influenza viruses (A/H3N2, A/H1N1pdm, B/Victoria, and B/Yamagata) and use these analyses to inform recommendations for the World Health Organization’s influenza vaccine composition meetings. We also maintain datasets for a subset of avian influenza viruses that have caused recurrent outbreaks in humans and domestic birds, including novel reassortant H5 viruses.

Influenza datasets

All source code is freely available under the terms of the GNU Affero General Public License. Screenshots may be used under a CC-BY-4.0 license and attribution to nextstrain.org must be provided.

This work is made possible by the open sharing of genetic data by research groups from all over the world. We gratefully acknowledge their contributions. Special thanks to Kristian Andersen, Josh Batson, David Blazes, Jesse Bloom, Peter Bogner, Anderson Brito, Matt Cotten, Ana Crisan, Tulio de Oliveira, Gytis Dudas, Vivien Dugan, Karl Erlandson, Nuno Faria, Jennifer Gardy, Nate Grubaugh, Becky Kondor, Dylan George, Ian Goodfellow, Betz Halloran, Christian Happi, Jeff Joy, Paul Kellam, Philippe Lemey, Nick Loman, Duncan MacCannell, Erick Matsen, Sebastian Maurer-Stroh, Placide Mbala, Danny Park, Oliver Pybus, Andrew Rambaut, Colin Russell, Pardis Sabeti, Katherine Siddle, Kristof Theys, Dave Wentworth, Shirlee Wohl and Cecile Viboud for comments, suggestions and data sharing.

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© 2015-2021 Trevor Bedford and Richard Neher