| 摘要 |
The invention is related to a dengue virus or chimeric dengue virus that contains a mutation in the 3' untranslated region (3'-UTR) comprising a ”30 mutation that removes the TL-2 homologous structure in each of the dengue virus serotypes 1, 2, 3, and 4, and nucleotides additional to the ”30 mutation deleted from the 3'-UTR that removes sequence in the 5' direction as far as the 5' boundary of the TL-3 homologous structure in each of the dengue virus serotypes 1, 2, 3, and 4, or a replacement of the 3'-UTR of a dengue virus of a first serotype with the 3'-UTR of a dengue virus of a second serotype, optionally containing the ”30 mutation and nucleotides additional to the ”30 mutation deleted from the 3'-UTR; and immunogenic compositions, methods of inducing an immune response, and methods of producing a dengue virus or chimeric dengue virus. |
