Please take a look at the Frequently Asked Questions and Tutorial if you are new to FluSurver. You could also look at this NA drug susceptibility example analysis walkthrough starting from GISAID and the GISAID access summary poster

Paste your protein or nucleotide FASTA sequence(s) into the text area below. (Sample FASTA sequences: 2009 H1N1 NA and HA)
 
   
  OR upload your protein or nucleotide sequences in a FASTA file
 
   
  The server can automatically determine the type of input (either protein or nucleotide) and the closest reference sequence among current
vaccine strains to compare. Also mixtures of genes/proteins (e.g. HA and NA or all genes of the same patient) can be provided as input.
To compare with more remotely related sequences/strains, it is possible to select a specific reference strain by choosing below.
   
  Compare with:
   
  Additional settings:
  ignore low quality bases for nucleotide input (indicated by lower case, except for all lower case sequences)
  genotype call for H5N1 2.3.4.4b genomes (user input must be nucleotide sequences and needs to contain exactly all 8 influenza segments)
   
   (estimated time needed: ~2 seconds per sequence in automatic mode)