A vector-borne disease is one in which the pathogenic microorganism is transmitted from an infected individual to another individual by an arthropod or other agent, sometimes with other animals...
Vectors are disease-carriers, such as fleas, ticks and mosquitoes. They pick the agents of disease from their hosts, then actively infect new hosts, usually through a bite.
There are many vectors that carry disease, here are a few; Ixodes tick - lyme diseaseMosquitos - malariaSand fly - leishmaniaBlack fly - onchocircosisReduvid bug - chagas diseaserats - bubonic plague