In humans, RNA does not serve as genetic material, instead, it serves as an adaptor, an enzyme, and aids in protein synthesis, among other things.
RNA serves as a messenger for the transmission of information.
RNA carries genetic information as well, thus functioning as genetic material.
The genome of certain viruses is made up of RNA.
In practically all animals, RNA also serves as a messenger, a short-lived intermediary that communicates the information encoded in our genes to the rest of the cell.
Nucleic acid makes up the genetic material (or genome) of all viruses.
However, viruses can utilize either RNA or DNA, which are both classes of nucleic acid.