transmission-based precautions are used to protect against infectious diseases when standard precautions are not adequate. the three types of transmission-based precautions are
Transmission-Based Precautions. Transmission-Based precautions are broken up into three categories: Contact Precautions, Droplet Precautions, and Airborne Precautions. They are always used in addition to Standard Precautions when the route of transmission is not interrupted by the use of Standard Precautions alone.