> … mosquito and sandfly saliva have also been shown to enhance infectivity and disease progression I wonder if it was mosquitos that have evolved to make dise

> … mosquito and sandfly saliva have also been shown to enhance infectivity and disease progression I wonder if it was mosquitos that have evolved to make disease they are carrying more infectious or it's the pathogen that evolved to take advantage of the mosquito's biology to make the host more likely to become infected. Regardless this is fascinating.