A qualitative measure of the degree of exposure to the causative agent. This
includes concepts such as "low", "medium" and "high". This quantifies how the
quantity that was available to be administered to the target differs from
typical or background levels of the substance.
Returns the enum constant of this type with the specified name.
The string must match exactly an identifier used to declare an
enum constant in this type. (Extraneous whitespace characters are
not permitted.)
Parameters:
name - the name of the enum constant to be returned.