Rationale Airborne — Tuberculosis Tuberculosis is transmitted through airborne droplet nuclei released into the air when an infected person coughs, sneezes, speaks, or sings. These droplets can remain suspended in the air and be inhaled by others. Vector-borne — Zika virus Zika virus is primarily transmitted through the bite of infected Aedes mosquitoes, making it a vector-borne disease. Waterborne — Cholera Cholera is caused by Vibrio cholerae and is transmitted through ingestion of contaminated water or food, classifying it as a waterborne disease.