What are the three categories of transmission based precautions?

The three categories of transmission-based precautions are contact precautions, droplet precautions, and airborne precautions. Contact precautions are used to prevent the spread of infections that can be transmitted through direct or indirect contact with contaminated surfaces or materials. Droplet precautions are implemented to protect against infections spread through respiratory droplets when an infected person coughs, sneezes, or talks. Airborne precautions are necessary for infections that can be transmitted through tiny airborne particles that remain suspended in the air over long distances.