ADEN, Yemen, July 8 (Xinhua) -- Yemen recorded more than 5,700 dengue fever cases and 30 related deaths in government-controlled areas during the first half of 2026, health authorities said Wednesday, warning the onset of the rainy season could accelerate the spread of the mosquito-borne disease. Taysir Al-Sami, a health official of the southwestern province of Taiz, said the southern port city of Aden accounted