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Influenza Virus Resource presents data obtained from the NIAID Influenza Genome Sequencing Project as well as from GenBank, combined with tools for flu sequence analysis and annotation. In addition, it provides links to other resources that contain flu sequences, publications and general information about flu viruses.

Read more about: This resource | Flu database | Flu sequence submission to GenBank | NIAID Influenza Sequencing Project | Influenza virus biology
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New features added to the Influenza Virus Resource
  • 11/03/2009: A new design of the Influenza Virus Resource went to public. New features include:
    1. Drug-resistance mutations are annotated and searchable in the database.
    2. Sequences can be retrieved from the database using multiple GenBank accession numbers.
    3. Collapsed identical sequences can be displayed and selected from the database search result.
    4. Database search result table can be downloaded in XML, CSV or tab-delimited format.

  • 07/20/2009: Pandemic (H1N1) 2009 virus sequences can now be excluded from the database search results.

  • 06/19/2009: 2009 H1N1 influenza virus sequences can now be retrieved from the database by selecting "Sequences from Pandemic (H1N1) 2009 virus only".

  • 06/18/2009: Twenty five new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 06/17/2009: Five new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 06/16/2009: Thirty seven new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 06/15/2009: Fifteen new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 06/14/2009: One new 2009 H1N1 influenza virus sequence is available in GenBank.

  • 06/13/2009: One new 2009 H1N1 influenza virus sequence is available in GenBank.

  • 06/12/2009: Eleven new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 06/11/2009: Seventy seven new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 06/10/2009: Seventy four new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 06/09/2009: Sixteen new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 06/08/2009: Ten new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 06/06/2009: Eleven new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 06/05/2009: Twenty six new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 06/04/2009: One hundred seventy one new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 06/03/2009: Six new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 06/02/2009: Sixty nine new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 06/01/2009: Forty one new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 05/31/2009: Fourteen new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 05/30/2009: Twenty six new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 05/29/2009: Two hundred sixty seven new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 05/28/2009: Fifty two new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 05/27/2009: Thirty three new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 05/26/2009: One hundred ninety one new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 05/25/2009: Eight new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 05/24/2009: Twenty one new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 05/23/2009: Seventy four new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 05/22/2009: Twenty six new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 05/21/2009: Seven new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 05/20/2009: Eight new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 05/19/2009: One hundred thirty six new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 05/18/2009: Twenty four new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 05/17/2009: Thirty three new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 05/16/2009: Eight new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 05/15/2009: One hundred and forty five new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 05/14/2009: Fifty three new 2009 H1N1 influenza virus sequences are available in GenBank. Also available in GenBank are 8 sequences from a "Suspected transmission of novel H1N1 virus from humans to pigs in Alberta".

  • 05/13/2009: Eighty four new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 05/12/2009: Eight new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 05/09/2009: Fifty two new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 05/08/2009: Twenty eight new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 05/07/2009: Eight new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 05/06/2009: One hundred and two new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 05/05/2009: Fifty new 2009 H1N1 influenza virus sequences (including one isolate from Mexico) are available in GenBank.

  • 05/04/2009: Seventy five new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 05/01/2009: Fourteen new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 04/30/2009: Sixteen new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 04/29/2009: Four new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 04/28/2009: Thirty four new 2009 H1N1 influenza virus sequences are available in GenBank.

  • 04/27/2009: The first 40 2009 H1N1 influenza virus sequences are available in GenBank.

  • 03/25/2009: Month and day can now be included in addition to year as collection date in the database search queries. Please note that not all sequences have month and day available. Therefore sequences with only year as collection date will not be included in a search if a month of the corresponding year is entered in the query. For example, a search for sequences from 2006/05 to 2008/11 will retrieve those with month in collection date for 2006 and 2008, but not those with only 2006 or 2008 as collection date (because they could be from 2006/04 or 2008/12). However, all sequences from 2007, with or without month in the collection date, will be included in such a query.

  • 11/04/2008: Proteins belong to segments that encode more than one protein (e.g. M1 and M2) can now be searched separately from the database.

  • 01/30/2008: Phylogenetic trees created by the tree tool can now be exported in the Newick format to be displayed by other tree-viewing programs.

  • 01/03/2008: A manuscript entitled The Influenza Virus Resource at the National Center for Biotechnology Information is published in Journal of Virology.

  • 10/17/2007: A manuscript entitled The Influenza Virus Resource at the National Center for Biotechnology Information is accepted by the Journal of Virology.

  • 10/05/2007: The signature mutation, E627K, in the PB2 protein (e.g. AY651719) that might confer high virulence of influenza viruses can be detected and reported by the genome annotation tool now.

  • 08/20/2007: An improved multiple sequence alignment tool and a new version of the tree building tool are available now. In the multiple sequence alignment result, the anchor/consensus sequence can be displayed for copying. The printer-friendly output of the multiple sequence alignment shows virus strain names in addition to accession numbers of the sequences. The tree building tool can take up to 1,000 sequences and has the ability to change the resolutions of branches of interest on the tree. Sequences on the tree can be searched by the fields in the database, and the resulting sequences or groups will be highlighted.

  • 07/11/2007: A new version of the tree building tool is available for testing. It can take up to 1000 sequences and has the ability to expand branches of interest on the tree.

  • 06/01/2007: A paper describing the web tool for flu genome annotation is published online in Nucleic Acids Research.

  • 05/14/2007: An option to remove identical sequences in a dataset is available now.

  • 05/11/2007: Some of the signature mutations that might confer drug resistance by influenza viruses can be detected and reported by the genome annotation tool now. Such mutations include V27A and S31N in the M2 protein, H274Y and R292K in the N1 subtype of neuraminidase, and N294S in the N2 subtype of neuraminidase.

  • 02/08/2007: The genome annotation tool can take multiple sequences as an input now.

  • 12/22/2006: Full-length nucleotide and protein sequences are flagged in the influenza_na.dat and influenza_aa.dat files in ftp.

  • 11/22/2006: Daily updates of the NCBI Influenza Virus Sequence Database are now available in the "updates" directory through ftp.

  • 10/04/2006: The genomic sequence annotation tool also works for Influenza B viruses now.

  • 06/22/2006: A web tool for flu genomic sequence annotation is now available.

  • 05/12/2006: Genomes of the same virus isolate but sequenced in different labs are now identified and grouped separately in the database.

  • 04/28/2006: In the multiple sequence alignment of coding regions, non-synonymous changes (in triplets) are now highlighted in a different background color.

  • 04/25/2006: The consensus sequence in the multiple sequence alignment can now be replaced with a sequence of your choice.

  • 04/19/2006: A nucleotide/protein sequence (e.g. AGCGAAAGCAGGGGT or RSKV) can now be added to the "Search by a string" box to be included in the database search.

  • 03/28/2006: The multiple sequence alignment is now shown in its intact in a scrollable window, and a printer-friendly version of the alignment is now available.

  • 03/20/2006: An advanced database search tool is now available.

  • 03/09/2006: In the FASTA sequences downloaded from the database, the following string is inserted between the GenBank sequence identifier and the sequence title in the FASTA definition lines: /host/segment number(name)/subtype/country/year/month/date/.

  • 02/13/2006: A list of GenBank accession numbers for selected protein or nucleotide sequences can now be downloaded from the database.

  • 12/14/2005: Continents have been added to the Country/Region field in the database.

  • 11/17/2005: The new design of the Influenza Virus Resource went to public.

  • 10/19/2005: Data in the NCBI Influenza Virus Sequence Database are now available through ftp.

  • 11/17/2004: The Influenza Virus Resource was first launched.
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