You are here Home Glossary of technical terms Glossary of technical terms virus Listen Print Share Twitter Facebook Email A tiny living organism, smaller than a bacterium, that can cause infections. Examples of diseases caused by viruses are measles, rubella, mumps, polio, influenza and hepatitis B. Page history Last updated 11 June 2018 Last reviewed 11 June 2018 Is there anything wrong with this page? Help us improve the Australian Immunisation Handbook What you were doing? (required) What went wrong? (required) Leave this field blank