The isolation of substational numbers of viral sequence variants at highly variable viral protein domains remain a major challanges ,several trials depends on the following......increase sucess of gene cloning and streamline the proces of futural engenineering of novel viral variants ....Clustred randsmization in a full length gene......Stsbilizating of thr clones and reduction of stress on host cells......The use of poission diztribution is proposed to approxametly sequencing out put to achivd coast effectivess

For more detailed see the attached ref.https://www.Sciencedirect.com/sci.

You can search these databases.

https://www.ncbi.nlm.nih.gov/genomes/FLU/Database/nph-select.cgi?go=database

https://openflu.vital-it.ch/browse.php

Thanks dear researchers, Salameh Barhoom and, Paula Andrea Figueroa

The following link helped us more to find sequences:

https://gisaid.org/