Do mosquitos carry viruses

malaria

Yellow Fervor

West Nile Virus

these diseases find a hospitable haven in the mosquito's saliva reserve. Mosquitoes use their saliva as a pain-killer and as an anti-coagulant so they actually push some into its victim when they bite. When a mosquito bits an infected animal it sucks these disease into its saliva space. When it bites an uninfected victim it pushes infected saliva into it/him/her.