'''Pathogens''' are organisms (e.g. [[bacteria]], [[viruses]], [[parasites]] and [[fungi]]) that cause [[disease]] in human beings.<ref>http://www.cdc.gov/vaccines/about/terms/glossary.htm#p</ref> | '''Pathogens''' are organisms (e.g. [[bacteria]], [[viruses]], [[parasites]] and [[fungi]]) that cause [[disease]] in human beings.<ref>http://www.cdc.gov/vaccines/about/terms/glossary.htm#p</ref> |