Kage Kazumi

Reader, I am a writer/student working on a novel that needs to spread a disease/virus all across the world (or most of it) and infecting millions of people world wide. I have been discussing this with fellow writers to see what would be the best way to do this. At first I thought of food, but had issues with food being sold and shipped world wide. One idea proposed was to use Mosquitos. A group of people could be infected with 'said unknown disease' and each person goes back home where their local Mosquitos feed on a few of them and spread it that way. I even threw in the idea of adding other blood sucking insects like the Kissing Bug, Ticks, and Bed Begs to help spread said disease. Do you think this would be a believable way to spread a disease or do you think people could contain it to fast? v/Respectfully, Kage