bacteriophagelambda congresses control coronaviren coronavirus coronaviruses dnaviruses epidemiology geneexpressionregulation genes genetic geneticaspects geneticcode geneticregulation genetics genetictechniques genetik génétiquevirale herpesviridaeinfections herpesvirusdiseases immunology influenza influenzaviruses lysogeny molecularbiology orthomyxoviridae orthomyxoviruses pathogenesis physiology prevention qw160s989s1971 replikation repressorproteins repressors rnaviruses variation variation(genetics) viral viralgenomes virusdiseases viruses virusimpfstoff virusinfektion virusreplication wc571p2971994