This citation points to a review of antisense techniques for knockdown of Dengue, West Nile, Yellow Fever, and Japanese Encephalitis. Includes a summary of work with Morpholino oligos for inhibiting replication and gene expression of Dengue and West Nile:
Stein DA, Shi PY. Nucleic acid-based inhibition of flavivirus infections. Front Biosci. 2008 Jan 1;13:1385-95.

http://www.ncbi.nlm.nih.gov/sites/entrez?Db=pubmed&Cmd=ShowDetailView&TermToSearch=17981637

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