Method to block the infection by flaviviruses, molecules and uses

A method for determining the susceptibility of a cell and/or an organism to the infection by dengue virus comprising interfering with an interaction of a viral envelope protein with alpha-2 macroglobulin receptor identified in the sequence listing as Seq. ID. 3, or with alpha-2 macroglobulin identified in the sequence listing as Seq. ID. 2.

(canceled)

Peptides identified in the sequence listing as Seq. IDs. 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17 and 18, wherein said peptides are the agents that interfere the interaction of the virus with the cellular receptor.