Table 2.

Commissioned Corps response team structure

Tier	Team Characteristics and Responsibilities
Tiers 1 and 2	The RDF teams: •Report within 12 h •On call every 5 mo •125 officers on the team (with specialists in clinical health, mental health, and applied public health)	The APHTs: •Report within 36 h •On call every 5 mo, with half the team serving as primary contacts •47 officers on each team	The MHTs: •Report within 36 h •On call every 5 mo •26 officers on each team
Tier 3	•Officers not assigned to Tier 1 or 2 teams •Have technical and subject matter expertise •Are “mission critical” employees—those designated by their agency to be nondeployable except in catastrophic circumstances
Tier 4	Inactive Reserve Corps •Exists to provide surge capacity during times of acute need and to fill critical staffing shortages that may impair the service's ability to carry out the mission	Medical Reserve Corps •Exists to improve the health and safety of communities across the country by organizing and using public health, medical, and other volunteers