Which of the following is a method of disease transmission?

• A. Contact Transmission
• B. Vector Borne Transmission
• C. Airborne Transmission
• D. All of the above

Answer: (D)

Different routes can spread disease, and recognizing these routes helps explain how outbreaks spread and how to stop them. Contact transmission happens when pathogens move from one person or object to another by touch, either through direct contact or via contaminated surfaces (fomites). Vector-borne transmission uses a living carrier, such as a mosquito or tick, to transfer pathogens from an infected host to a new one. Airborne transmission involves pathogens suspended in air—tiny particles or droplets that can be inhaled by others, potentially at a distance from the source. Each of these pathways is a valid way that diseases can spread, so all of the above captures the true diversity of transmission routes. In practice, preventing disease requires addressing all relevant routes—clean hands and surfaces to reduce contact, vector control to stop vector-borne spread, and good ventilation or masks to minimize airborne spread.