Table 1.

Qualitative descriptors of probabilities according to OIE standards [47].

Descriptor	OIE definitions
Very high	The event occurs almost certainly.
High	The event occurs very often.
Moderate	The event occurs regularly.
Low	The event is rare but does occur.
Very low	The event is rare but cannot be excluded.
Negligible	The event is so rare that it does not merit to be considered.