ABC news reported in January 2010 that Acuvax Ltd, an Australian company has started the first round of human trials of a new Dengue Vaccine in the United States. The vaccine reportedly uses proteins found in the dengue virus to trigger an immune response.

Read more at:
http://www.abc.net.au/news/stories/2010/01/27/2802344.htm
http://www.acuvax.com.au/assets/hawaii-biotech-inc.html