Betapleolipovirus HRPV11 Betapleolipovirus HRPV12 Betapleolipovirus HRPV3 Betapleolipovirus HRPV9 Betapleolipovirus SNJ2 Bhanja bandavirus Bhendi yellow vein alphasatellite Bhendi yellow vein Bhubhaneswar virus Bhendi yellow vein Haryana virus Bhendi yellow vein mosaic betasatellite Bhendi yellow vein mosaic Delhi virus Bhendi yellow vein mosaic virus Bidens mosaic virus Bidens mottle virus Bimiti orthobunyavirus Birao orthobunyavirus Birch leaf roll-associated virus Birdsfoot trefoil enamovirus 1 Bitter gourd yellow mosaic virus Black beetle virus Black Creek Canal orthohantavirus Black medic leaf roll virus Black queen cell virus Black raspberry necrosis virus Black robin associated gemykibivirus 1 Blackberry chlorotic ringspot virus Blackberry leaf mottle associated emaravirus Blackberry vein banding-associated virus Blackberry virus A Blackberry virus E Blackberry virus F Blackberry virus S Blackberry virus Y Blackberry yellow vein-associated virus Blackbird associated gemycircularvirus 1 Blackbird associated gemykibivirus 1 Blackcurrant betanucleorhabdovirus Blackcurrant closterovirus 1 Blackcurrant reversion virus Blackleg ixovirus Blainvillea yellow spot virus Blattodean blattambidensovirus 1 Blattodean pefuambidensovirus 1 Blechum interveinal chlorosis virus Blechum yellow vein virus Blotched snakehead virus Blue gill hepatitis B virus Blue squill virus A Blueberry fruit drop associated virus Blueberry latent spherical virus Blueberry latent virus Blueberry leaf mottle virus Blueberry mosaic associated ophiovirus Blueberry necrotic ring blotch virus Blueberry red ringspot virus Blueberry scorch virus Blueberry shock virus Blueberry shoestring virus Blueberry virus A Bluetongue virus Boerhavia yellow spot virus Bokeloh bat lyssavirus Bolahun anphevirus Bole mivirus Bombali ebolavirus Bombyx mori bidensovirus Bombyx mori latent virus Bombyx mori Mag virus Bombyx mori nucleopolyhedrovirus Bombyx mori Pao virus Boolarra virus Boosepivirus A Boosepivirus B Boosepivirus C Bopivirus A Bordetella virus BPP1 Bordetella virus CN1 Bordetella virus CN2 Bordetella virus FP1 Bordetella virus MW2 Bordetella virus PHB04 Bornean orangutan simian foamy virus Bos taurus polyomavirus 1 Botambi orthobunyavirus Botrylloides leachii nidovirus Botryoshaeria dothidea polymycovirus 1 Botryosphaeria dothidea chrysovirus Botrytis botoulivirus Botrytis cinerea betaendornavirus 1 Botrytis porri botybirnavirus 1 Botrytis virus F Botrytis virus X Bouboui virus Bougainvillea chlorotic vein banding virus Bovine alphaherpesvirus 1 Bovine alphaherpesvirus 2 Bovine alphaherpesvirus 5 Bovine associated bovismacovirus 1 Bovine associated bovismacovirus 2 Bovine associated cosmacovirus 1 Bovine associated cyclovirus 1 Bovine associated drosmacovirus 1 Bovine associated gemycircularvirus 1 Bovine associated gemykibivirus 1 Bovine associated gemykrogvirus 1 Bovine associated huchismacovirus 1 Bovine associated huchismacovirus 2 Bovine associated porprismacovirus 1 Bovine atadenovirus D Bovine fever ephemerovirus Bovine foamy virus Bovine gammaherpesvirus 4 Bovine gammaherpesvirus 6 Bovine immunodeficiency virus Bovine leukemia virus Bovine mastadenovirus A Bovine mastadenovirus B Bovine mastadenovirus C Bovine