Dengue tetravalent vaccine commonly containing a 30 nucleotide deletion in the 3'-UTR of dengue fever 1, 2, 3 and 4 or antigenic chimeric dengue virus 1, 2, 3 and 4
A rDEN3/4”30(ME), rDEN2/4”30(ME) or rDEN1/4”30(ME) recombinant chimeric dengue virus containing a 30 nucleotide deletion (”30) in a section of the 3' untranslated region of dengue type 4 genome, where said 30 nucleotide deletion corresponds to the TL2 stem-loop structure.