31. It's very potent, " said Frank Hall, chief of vector control for Los Angeles County Health Services Department. 32. Vector control in many developing countries can have tremendous impacts as it increases mortality rates, especially among infants. 33. The vector control district's mission is to promote community health, comfort and welfare through effective and responsive vector control. 34. Using vector control and strict vaccination programs, the urban cycle of yellow fever was nearly eradicated from South America. 35. Integrated vector control may also alleviate pressure on mass drug administration, especially with respect to rapidly evolving drug resistance. 36. The vector control district's mission is to promote community health, comfort and welfare through effective and responsive vector control. 37. Vector control of the psyllid, which is the sole means for citrus greening to spread is now done routinely. 38. Propulsion for the mid-course trajectory correction was provided by a 224N thrust monopropellant hydrazine engine with four jet-vane vector control. 39. The research in Sylmar helps Vector Control decide whether an area should be " fogged, " sprayed with a pesticide. 40. In 1984 he was honored by the California Mosquito and Vector Control Association with a resolution recognizing his many accomplishments.