non-cellular organism virus 576.64 http://id.loc.gov/authorities/subjects/sh85143833 http://purl.obolibrary.org/obo/NCBITaxon_10239 http://purl.obolibrary.org/obo/NCIT_C14283 https://en.wikipedia.org/wiki/Virus https://eol.org/pages/59284714 https://species.wikimedia.org/wiki/Virus https://www.wikidata.org/wiki/Q808 QR355-QR502 A virus is a non-cellular organism that can replicate only inside the living cells of an organism. An infectious agent which consists of two parts, genetic material and a protein coat. These organisms lack independent metabolism, and they must infect the cells of other types of organisms to reproduce. Most viruses are capable of passing through fine filters that retain bacteria, and are not visible through a light microscope. Viruses viruses Glossary of HIV/AIDS-Related Terms