Summary & review

Welcome to this final module on biorisk management.

In this session, we will review the key concepts and principles that form the foundation of an effective biorisk management program.

Let’s begin with the AMP model, which serves as the core framework for managing biorisk.

AMP stands for Assessment, Mitigation, and Performance. It is a continuous cycle used to identify hazards, reduce risk, and verify that controls are working effectively.

The process begins with assessment. This involves identifying potential hazards in the laboratory and evaluating the risks they pose. To do this effectively, we must consider several factors: the biological agents being handled, the procedures being performed, the environment in which the work takes place, and the personnel conducting the tasks.

Each of these elements influences the overall level of risk.

Once risks have been identified, we move to mitigation.

Mitigation focuses on reducing risk to an acceptable level through the application of control measures. These controls must be carefully selected based on the specific situation, available resources, and operational context.

Biorisk management is not purely technical—it requires thoughtful judgment. In this sense, it is both a science and an art.

The final component is performance.

This step involves verifying that the implemented controls are effective. One way to do this is by repeating the original risk assessment, this time incorporating the control measures, and comparing the results.

Additional methods include conducting audits and inspections to monitor ongoing conditions. The goal is to confirm—not assume—that risks have been reduced.

At this point, it is important to revisit the distinction between a hazard and a risk.

A hazard is anything with the potential to cause harm. In the laboratory, biological agents are hazards due to their ability to cause disease.

Risk, on the other hand, refers to the likelihood that harm will occur and the severity of its consequences.

When evaluating risk, we consider two primary factors: likelihood and consequence.

Likelihood refers to the probability that an adverse event, such as infection, will occur. Consequence refers to the potential outcome—ranging from mild illness to severe disease or even death.

Because these evaluations can be subjective, it is important to involve a team in the assessment process to reach a balanced and informed consensus.

To support this process, we often use a risk matrix.

A risk matrix allows us to combine likelihood and consequence into a structured format, typically categorized as low, moderate, high, or very high risk.

This tool helps visualize risk levels and supports decision-making. It can be used both before and after implementing controls to evaluate how effectively risks have been reduced.

Now let’s turn to risk mitigation strategies.

A useful way to organize these strategies is through the hierarchy of controls:

• Elimination or Substitution
• Engineering Controls
• Administrative Controls
• Practices and Procedures
• Personal Protective Equipment, or PPE

Elimination and substitution are the most effective controls, as they remove or replace the hazard entirely. However, they are not always feasible.

Engineering controls involve physical systems or equipment designed to contain or reduce exposure, such as biosafety cabinets.

Administrative controls include policies, procedures, and guidelines that direct how work is performed. These provide structure but depend heavily on human compliance.

Practices and procedures focus on how tasks are carried out in daily operations and require proper training and oversight.

Finally, PPE provides a barrier between the worker and the hazard. While essential, it is the least effective control because it does not eliminate the hazard and relies entirely on correct and consistent use.

Each type of control has strengths and limitations.

For example, engineering controls are highly reliable but may be costly. Administrative controls are easier to implement but less dependable due to variability in human behavior. PPE is accessible and inexpensive but offers limited protection if not used correctly.

For this reason, a layered approach—using multiple controls together—is the most effective strategy.

Another important concept is containment.

Containment is divided into two levels: primary and secondary.

Primary containment protects the worker and includes measures that are in direct contact with the hazard, such as biosafety cabinets and PPE.

Secondary containment protects the environment and includes facility design features such as ventilation systems, HEPA filtration, and waste management procedures.

Together, these layers form a comprehensive barrier that prevents the release of hazardous materials.

As part of this module, you are encouraged to reflect on your own work environment.

Consider what measures provide primary containment and what systems ensure secondary containment. Identifying these elements helps reinforce your understanding of how risks are managed in practice.

Returning to the AMP model, we now focus on performance evaluation.

After implementing controls, it is essential to reassess risk. This confirms whether the controls have effectively reduced risk levels.

This process should be performed frequently. Regular reassessment ensures that controls remain effective over time, especially as conditions change.

Finally, consider how these concepts apply in real-world scenarios.

Whether working in a diagnostic laboratory, conducting research on infectious diseases, performing animal studies, or engaging in fieldwork, the same principles apply. By assessing risk, implementing appropriate controls, and evaluating performance, we can reduce risk to acceptable levels.

In summary, biorisk management is a continuous, structured process.

It requires understanding hazards, evaluating risks, applying layered controls, and verifying their effectiveness through ongoing assessment.

Thank you for participating in this lesson.

Please take the final exam to test your understanding of these key concepts.

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