Can we break the cycle of insect transmission & its impact on health? Insect Vector-Borne Diseases #GreshamLecture Many of the major diseases of humans are transmitted by insect vectors. Malaria, sleeping sickness, typhus, dengue, Zika and plague are examples where mosquitoes, flies, fleas or ticks transmit. The advantage to the infection is that you can be infected by someone you have never met, often over wide distances. The advantage to humans is that we can act on the insect vector and break