Within the preventive campaigns being carried out by the Dengue Control Project funded by King Salman Center for Relief and Humanitarian Aid in Yemeni provinces, the second phase of the fog spraying operation started today at Al-Muzaffar Directorate in Yemeni governorate of Taiz The director of the health office in the Directorate of Muzaffar and the campaign's supervisor, Dr. Abdul Rahman Al-Haidari, said that the second phase comes within one of the programs and preventive plans to combat mosquitoes as a key factor to transmit the dengue fever among people, pointing out that the spraying operation lasts 7 days.