Welcome to ClassyFlu - the Influenza A classification tool!


ClassyFlu can:

- classify hemagglutinin (HA) and neuraminidase (NA) gene sequences of influenza A according to their subtypes
- additionally classify HA gene sequences of HPAIV of subtype H5N1 according to their subfamilies. These subfamilies are provided by the H5N1 Evolution Working Group. (Updated unified nomenclature system for the highly pathogenic H5N1 avian influenza viruses)
- distinguish between different subclades within subtype H7

The following subtypes and subclades are represented:
H1
H2
H3
H4
H5notHPAIV
H5N1_HPAIV_clade0
H5N1_HPAIV_clade1
H5N1_HPAIV_clade1.1
H5N1_HPAIV_clade2.1.1
H5N1_HPAIV_clade2.1.2
H5N1_HPAIV_clade2.1.3
H5N1_HPAIV_clade2.1.3.1
H5N1_HPAIV_clade2.1.3.2
H5N1_HPAIV_clade2.1.3.3
H5N1_HPAIV_clade2.2
H5N1_HPAIV_clade2.2.1
H5N1_HPAIV_clade2.2.1.1
H5N1_HPAIV_clade2.2.2
H5N1_HPAIV_clade2.3.1
H5N1_HPAIV_clade2.3.2
H5N1_HPAIV_clade2.3.2.1
H5N1_HPAIV_clade2.3.3
H5N1_HPAIV_clade2.3.4
H5N1_HPAIV_clade2.3.4.1
H5N1_HPAIV_clade2.3.4.2
H5N1_HPAIV_clade2.3.4.3
H5N1_HPAIV_clade2.4
H5N1_HPAIV_clade2.5
H5N1_HPAIV_clade3
H5N1_HPAIV_clade4
H5N1_HPAIV_clade5
H5N1_HPAIV_clade6
H5N1_HPAIV_clade7
H5N1_HPAIV_clade7.1
H5N1_HPAIV_clade7.2
H5N1_HPAIV_clade8
H5N1_HPAIV_clade9
H6
H7
H7_China-1.1
H7_China-1.2
H7_Europe-1
H7_Europe-2
H7_Europe-3
H7_Europe-4
H7_Europe-5
H7_Europe-Asia
H7_NorthAmerica
H7_Pakistan
H7_SEE-Asia-0
H7_SEE-Asia-1
H7_SEE-Asia-2
H8
H9
H10
H11
H12
H13
H14
H15
H16
H17

N1
N2
N3
N4
N5
N6
N7
N8
N9
N10