So although we do have some examples of double stranded RNA viruses, the single stranded RNA viruses are much more common. So RNA viruses basically inject their RNA molecules, the RNA nucleic acids into the cynoplasm of that whole cell. And once inside the cytoplasm, the RNA can be used to synthesize the proteins or the RNA can be used to basically transcribe into mRNA and then that viral mRNA can be used to form the proteins needed for the virus to actually survive. Now a special category of RNA viruses include something called a retrovirus. So these viral agents. These RNA viruses contain a protein enzyme known as reverse transcriptase.