Regional AlertLaos sees decline in dengue cases in first half of 2024 July 16, 2024By MBDS Team5 July 2024. Laos saw a decline in dengue fever cases in the first six months of 2024, compared to the corresponding period of 2023. From January to June 2024, Laos recorded 5,192 cases of dengue fever and the virus has caused three deaths.