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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, annotation and submission to GenBank. 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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Sequences from the human A (H7N9) 2013 outbreak
New! 04/17/2013: The complete genome of a human A (H7N9) isolate has been released in GenBank. It is available at NCBI's Influenza Virus Sequence Database. More news

Search the Flu database, build queries, retrieve sequences, apply analysis tools Begin
Database Select influenza sequences by virus, subtype, host, and other criteria
Genome SetFind complete genome sets
Alignment Align your sequence(s) and others in the database (up to 1000 sequences)
TreeBuild a clustering or phylogenetic tree
BLAST BLAST a flu sequence against the database
AnnotationAnnotate flu genomic sequences
SubmissionSubmit flu sequences to GenBank
FTPRetrieve database and sequence data through ftp

Sample SearchesBegin
  • Full-length HA proteins of the H3 subtype Influenza A virus in USA from 1998 to 2002.
  • Complete genome sets of the Pandemic (H1N1) 2009 Influenza A virus from Japan with the "H274Y" Drug-resistance mutaion in the NA protein.
  • New records in Entrez
  • Publications on influenza viruses from the past 2 weeks
  • All influenza sequences updated in GenBank from the past week
  • How to cite NCBI's Influenza Virus Resource
    Bao Y., P. Bolotov, D. Dernovoy, B. Kiryutin, L. Zaslavsky, T. Tatusova, J. Ostell, and D. Lipman. The Influenza Virus Resource at the National Center for Biotechnology Information. J. Virol. 2008 Jan;82(2):596-601.

    NCBI's Influenza Virus Resource has been cited by these publications in PubMed.

    Our recent publications
  • Zaslavsky L, et al. Visualization of large influenza virus sequence datasets using adaptively aggregated trees with sampling-based subscale representation. BMC Bioinformatics, 2008;9:237.
  • Zaslavsky L, et al. Accelerating the neighbor-joining algorithm using the adaptive bucket data structure. Bioinformatics Research and Applications. Lecture Notes in Computer Science, Springer-Verlag, 2008;4983:122-133.
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