What is the difference between a Tier 1 agent and Class A agent?

What is the difference between a Tier 1 agent and Class A agent?

• A. Tier 1 and Class A are the same
• B. Tier 1 agents have enforceable regulations attached, while Class A is only a CDC-listed set of potential serious bioterrorism agents
• C. Class A agents have enforceable regulations attached, while Tier 1 is only a list
• D. Tier 1 applies to toxins only; Class A applies to organisms

Answer: (B)

Tier 1 and Class A reflect two different ways the system handles high-risk biological agents. Tier 1 denotes agents or toxins that have enforceable regulations under the Federal Select Agent Program, meaning facilities must be registered and meet strict security, biosafety, personnel background checks, incident reporting, and related controls to possess, use, or transfer them. Class A, by contrast, is a CDC-listed set of agents (and toxins) deemed by public health authorities to pose the greatest potential threat, guiding prioritization and preparedness, but not automatically imposing the same federal regulatory controls as Tier 1. So the key difference is that Tier 1 has enforceable regulations attached, while Class A is a prioritized list.

Tier 1 and Class A reflect two different ways the system handles high-risk biological agents. Tier 1 denotes agents or toxins that have enforceable regulations under the Federal Select Agent Program, meaning facilities must be registered and meet strict security, biosafety, personnel background checks, incident reporting, and related controls to possess, use, or transfer them. Class A, by contrast, is a CDC-listed set of agents (and toxins) deemed by public health authorities to pose the greatest potential threat, guiding prioritization and preparedness, but not automatically imposing the same federal regulatory controls as Tier 1. So the key difference is that Tier 1 has enforceable regulations attached, while Class A is a prioritized list.