What characterizes a Category A infectious substance?

A Category A infectious substance is characterized by its ability to contain pathogens that can cause life-threatening diseases in humans. This classification is crucial for the safe handling, transportation, and management of these substances. Category A materials pose significant health risks, as they can lead to serious consequences if exposure occurs, making strict regulatory measures necessary.

The distinction of Category A is vital in ensuring that those who handle these substances are aware of the potential dangers and equipped with the knowledge to comply with safety protocols. This includes understanding the necessary precautions, such as using appropriate personal protective equipment and ensuring secure packaging during transport. The other options inaccurately represent the characteristics of Category A; they either suggest a lack of risk or imply that these substances are not hazardous, which contradicts the critical nature of the classification. Category A substances are in fact deliberately categorized to indicate their potential for serious harm to public health and safety.