Which access type potentially restricts personnel to certain areas only?

Limited access is the correct choice when discussing access types that potentially restrict personnel to certain areas only. This type of access is designed to ensure that only authorized individuals can enter specific locations within a facility, which is particularly important in environments where sensitive research or vulnerable animals are present.

Limited access helps maintain security and minimize the risk of contamination or interference with experiments and animal care procedures. By controlling who can enter certain areas, it is easier to enforce protocols related to biosafety and animal welfare. This access type is crucial in research and laboratory settings to protect both the animals and the integrity of the research being conducted.

In contrast, controlled access implies supervision but may not restrict access to the same degree, allowing more personnel to enter with some regulations. Barrier access refers to physical barriers that prevent entry, but they do not specifically restrict personnel access. Full access means no restrictions on entry, which is contrary to the idea of restricting personnel to certain areas only.