- Palyam virus
- Pangola stunt virus
- Panicum mosaic virus
- Panicum streak virus
- Panine herpesvirus 1
- Panine herpesvirus 2
- Papaya leaf curl China virus
- Papaya leaf curl Guandong virus
- Papaya leaf curl virus
- Papaya leaf distortion mosaic virus
- Papaya mosaic virus
- Papaya ringspot virus
- Papiine herpesvirus 1
- Papiine herpesvirus 2
- Papillomavirus
- Papillomavirus sylvilagi
- Papovavirus
- Paprika mild mottle virus
- Parainfluenza virus
- Parainfluenza virus 5
- Parainfluenza virus type 1
- Parainfluenza virus type 2
- Parainfluenza virus type 3
- Parainfluenza virus type 4
- Paramecium bursaria Chlorella virus 1
- Paramecium bursaria Chlorella virus A1
- Paramecium bursaria Chlorella virus AL1A
- Paramecium bursaria Chlorella virus AL2A
- Paramecium bursaria Chlorella virus BJ2C
- Paramecium bursaria Chlorella virus CA4A
- Paramecium bursaria Chlorella virus CA4B
- Paramecium bursaria Chlorella virus IL3A
- Paramecium bursaria Chlorella virus NC1A
- Paramecium bursaria Chlorella virus NE8A
- Paramecium bursaria Chlorella virus NY2A
- Paramecium bursaria Chlorella virus NYs1
- Paramecium bursaria Chlorella virus SC1A
- Paramecium bursaria Chlorella virus XY6E
- Paramecium bursaria Chlorella virus XZ3A
- Paramecium bursaria Chlorella virus XZ4A
- Paramecium bursaria Chlorella virus XZ4C
- Paramyxovirus
- Paraná virus
- Parapoxvirus
- Parapoxvirus of red deer in New Zealand
- Paravaccinia virus
- Pariacoto virus
- Parietaria mottle virus
- Parsnip mosaic virus
- Parsnip yellow fleck virus
- Parvovirus
- Parvovirus B19
- Parvovirus group
- Passiflora chlorosis virus
- Passiflora latent virus
- Passion fruit woodiness virus
- Passion fruit yellow mosaic virus
- Pasteurella phage F108
- Patois virus
- Pea early-browning virus
- Pea enation mosaic virus
- Pea enation mosaic virus-1
- Pea enation mosaic virus-2
- Pea green mottle virus
- Pea mild mosaic virus
- Pea necrotic yellow dwarf virus
- Pea seed-borne mosaic virus
- Pea stem necrosis virus
- Pea streak virus
- Peach chlorotic mottle virus
- Peach latent mosaic viroid
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- Peach mosaic virus
- Peach rosette mosaic virus
- Peanut chlorotic streak virus
- Peanut clump virus
- Peanut mottle virus
- Peanut stunt virus
- Peanut yellow mosaic virus
- Pear blister canker viroid
- Pedilenthus leaf curl virus
- Pelargonium flower break virus
- Pelargonium leaf curl virus
- Pelargonium line pattern virus
- Pelargonium necrotic spot virus
- Pelargonium zonate spot virus
- Penicillium brevicompactum virus
- Penicillium chrysogenum virus
- Penicillium cyaneo-fulvum virus
- Penicillium stoloniferum virus F
- Penicillium stoloniferum virus S
- Pennisetum mosaic virus
- Pepino mosaic virus
- Pepper chat fruit viroid
- Pepper curly top virus
- Pepper golden mosaic virus
- Pepper huasteco yellow vein virus
- Pepper leaf curl Bangladesh virus
- Pepper leaf curl Lahore virus
- Pepper leaf curl virus
- Pepper mild mottle virus
- Pepper mottle virus
- Pepper ringspot virus
- Pepper severe mosaic virus
- Pepper veinal mottle virus
- Pepper yellow leaf curl Indonesia virus
- Pepper yellow mosaic virus
- Pepper yellow vein Mali virus
- Perina nuda virus
- Periplaneta fuliginosa densovirus
- Peru tomato mosaic virus
- Peruvian horse sickness virus
- Peste-des-petits-ruminants virus
- Pestivirus
- Petunia asteroid mosaic virus
- Petunia vein banding virus
- Petunia vein clearing virus
- Pfaffia mosaic virus
- Phaius virus X
- Phanerotoma flavitestacea bracovirus
- Phaseolus vulgaris endornavirus
- Phaseolus vulgaris Tpv2-6 virus
- Philosamia cynthia x ricini virus
- Phipapillomavirus 1
- Phlebovirus
- Phnom Penh bat virus
- Phocid herpesvirus 1
- Phocid herpesvirus 2
- Phocine distemper virus
- Pholetesor ornigis bracovirus
- Phormidium phage Pf-WMP3
- Phormidium phage Pf-WMP4
- Phthorimaea operculella granulovirus
- Physalis mottle virus
- Physarum polycephalum Tp1 virus
- Phytophthora endornavirus 1
- Phytoreovirus
- Pichinde virus
- Picodnavirus
- Picornavirus
- Pig cytomegalovirus
- Pig-tailed macaque parvovirus
- Pigeon circovirus
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- Pigeonpox virus
- Pilayella littoralis virus 1
- Pineapple bacilliform CO virus
- Pineapple bacilliform ER virus
- Pineapple mealybug wilt-associated virus 1
- Pineapple mealybug wilt-associated virus 2
- Pineapple mealybug wilt-associated virus 3
- Pipapillomavirus 1
- Pipapillomavirus 2
- Piper yellow mottle virus
- Pipistrellus bat coronavirus HKU5
- Pirital virus
- Piry virus
- Pixuna virus
- Plant rhabdovirus group
- Plant virus
- Plantago asiatica mosaic virus
- Plantago mottle virus
- Plantago severe mottle virus
- Plantain virus X
- Plautia stali intestine virus
- Pleione virus Y
- Pleurotus ostreatus virus 1
- Plodia interpunctella granulovirus
- Plum bark necrosis stem pitting-associated virus
- Plum pox virus
- Plutella xylostella granulovirus
- Pneumonia virus of mice
- Pneumovirus
- Poa semilatent virus
- Poinsettia latent virus
- Poinsettia mosaic virus
- Pokeweed mosaic virus
- Poliomyelitis virus
- Poliovirus
- Polydnavirus
- Polyhedral virus
- Polyoma virus
- Polyomavirus
- Polyomavirus bovis
- Polyomavirus cercopitheci
- Polyomavirus hominis 2
- Polyomavirus maccacae 1
- Polyomavirus muris 1
- Polyomavirus muris 2
- Polyomavirus papionis 1
- Polyomavirus papionis 2
- Polyomavirus sylvilagi
- Pongine herpesvirus 1
- Pongine herpesvirus 2
- Poplar mosaic virus
- Porcine adenovirus A
- Porcine adenovirus B
- Porcine adenovirus C
- Porcine circovirus-1
- Porcine circovirus-2
- Porcine enterovirus B
- Porcine epidemic diarrhea virus
- Porcine hemagglutinating encephalomyelitis virus
- Porcine parvovirus
- Porcine reproductive and respiratory syndrome virus
- Porcine rubulavirus
- Porcine sapelovirus
- Porcine teschovirus
- Porcine torovirus
- Porcine transmissible gastroenteritis virus
- Porcine type C virus
- Porcine type-C oncovirus
- Possum adenovirus A
- Potato aucuba mosaic virus
- Potato black ringspot virus
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- Potato latent virus
- Potato leaf roll virus
- Potato leafroll virus
- Potato mop top virus
- Potato mop-top virus
- Potato spindle tuber viroid
- Potato virus A
- Potato virus M
- Potato virus P
- Potato virus S
- Potato virus T
- Potato virus U
- Potato virus V
- Potato virus X
- Potato virus Y
- Potato yellow dwarf virus
- Potato yellow mosaic Panama virus
- Potato yellow mosaic virus
- Potato yellow vein virus
- Potexvirus
- Pothos latent virus
- Potyvirus
- Powassan virus
- Pox virus
- Poxvirus
- Poxvirus variolae
- Primate T-lymphotropic virus 1
- Primate T-lymphotropic virus 2
- Primate T-lymphotropic virus 3
- Prochlorococcus phage P-SSP7
- Prospect Hill virus
- Protapanteles paleacritae bracovirus
- Providence virus
- Provirus
- Prune dwarf virus
- Prunus necrotic ringspot virus
- Pseudalatia unipuncta granulovirus
- Pseudoalteromonas phage PM2
- Pseudocowpox virus
- Pseudomonad phage gh-1
- Pseudomonas phage 14-1
- Pseudomonas phage 42
- Pseudomonas phage 119X
- Pseudomonas phage EL
- Pseudomonas phage F8
- Pseudomonas phage F116
- Pseudomonas phage LBL3
- Pseudomonas phage Lin68
- Pseudomonas phage LKA1
- Pseudomonas phage LMA2
- Pseudomonas phage LUZ24
- Pseudomonas phage PaP3
- Pseudomonas phage PB1
- Pseudomonas phage Pf1
- Pseudomonas phage Pf2
- Pseudomonas phage Pf3
- Pseudomonas phage phi6
- Pseudomonas phage phiCTX
- Pseudomonas phage phiKMV
- Pseudomonas phage phiKZ
- Pseudomonas phage SN
- Pseudoplusia includens virus
- Pseudorabies virus
- Psipapillomavirus 1
- Psittacid herpesvirus 1
- Psittacinepox virus
- Puma lentivirus
- Pumpkin yellow mosaic virus
- Punta Toro virus
- Puumala virus
- Pyrobaculum spherical virus
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