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- 2009 swine flu pandemic
- Abelson murine leukemia virus
- Acam2000
- Acanthamoeba
- Acanthamoeba castellanii
- Acanthamoeba infection
- Acanthamoeba keratitis
- Acanthamoeba polyphaga
- Acholeplasma
- Acholeplasma laidlawii
- Acquired immunodeficiency syndrome
- Actinomycetoma
- Actinomycosis
- Acute gastroenteritis
- Acute hepatitis
- Acute HIV infection
- Acute pericarditis
- Adenitis
- Adeno associated virus
- Adeno-associated virus
- Adenoviral keratoconjunctivitis
- Aedes aegypti
- Aedes albopictus
- Aedes japonicus
- Aerobactin
- African swine fever
- African swine fever virus
- African trypanosomiasis
- Agar dilution
- AIDS
- AIDS education and training centers
- AIDS-related lymphoma
- Airborne transmission
- Airsacculitis
- Alcoholic hepatitis
- Alphacoronavirus
- Alphaherpesvirinae
- Alphapapillomavirus
- Alphaproteobacteria
- Alphavirus
- Alphaviruses
- Amblyomma americanum
- AMC
- Amebiasis
- Ames strain
- Amoebic dysentery
- Amoebic liver abscess
- Anaerobic infections
- Anaplasma
- Anaplasma phagocytophilum
- Anaplasmosis
- Ancylostoma caninum
- Ancylostoma duodenale
- Ancylostomiasis
- Andes virus
- Anelloviridae
- Angiostrongyliasis
- Angiostrongylus cantonensis
- Animal virus
- Animal viruses
- Anisakiasis
- Anisakis
- Anisakis simplex
- Anopheles
- Anopheles culicifacies
- Anopheles gambiae
- Anopheles sinensis
- Anosmia
- Ant venom
- Anthelmintics
- Anthrax
- Anthrax vaccine
- Antibiogram
- Antibiotic associated diarrhea
- Antibiotic resistance
- Antibiotic resistant bacteria
- Antibiotic sensitivity
- Antibiotic susceptibility testing
- Antibiotic-associated diarrhea
- Antibiotic-resistant bacteria
- Antifungal resistance
- Antigenic drift
- Antigenic shift
- Antimicrobial resistance
- Antimicrobial stewardship
- Antiparasitic agent
- Antiparasitic agents
- Antonine Plague
- Apicoplasts
- Arbovirus
- ARC
- Arenaviridae
- Arenavirus
- Argentine hemorrhagic fever
- Arteriviridae
- Arterivirus
- Ascariasis
- Ascaris suum
- Ascoviridae
- Asfarviridae
- Aspergillus clavatus
- Aspergillus fumigatus
- Astroviridae
- Astrovirus
- Asymptomatic carriers
- Atopobium
- Atopobium vaginae
- Autoimmune hepatitis
- Avermectin
- Avian infectious bronchitis
- Avian infectious bronchitis virus
- Avian influenza
- Avian influenza virus
- Avian leukosis
- Avian leukosis virus
- Avian malaria
- Avian metapneumovirus
- Avian myeloblastosis virus
- Avian paramyxovirus
- B virus
- Babesia
- Babesia bovis
- Babesia divergens
- Babesiosis
- Baby hamster kidney cells
- Bacillary dysentery
- Bacilli
- Bacillus anthracis
- Bacteremia
- Bacterial pneumonia
- Bacterial strain
- Bacteriocins
- Bacteriophage ms2
- Bacteriophages
- Baculoviridae
- Baculovirus
- Balamuthia
- Balamuthia mandrillaris
- Balantidium coli
- Baltimore classification
- Bartonellosis
- Basic reproduction number
- Basidiobolomycosis
- Basidiobolus
- Baylisascaris
- Baylisascaris procyonis
- Beauveria bassiana
- Bed bug infestation
- Bed bugs
- Bejel
- Betaarterivirus suid 1
- Betacoronavirus
- Betaherpesvirinae
- Betaproteobacteria
- Bifidobacteriaceae
- Bifidobacterium
- Bifidobacterium bifidum
- Bifidobacterium longum
- Bifidus factor
- Biologic agent
- Bird flu
- Birnaviridae
- Black fly
- Blastomyces dermatitidis
- Blight
- Blood borne virus
- Blood fluke
- Bloodstream infection
- Bloody diarrhea
- Bocaparvovirus
- Bocavirus
- Bolivian hemorrhagic fever
- Bone infection
- Borna disease
- Bornholm disease
- Borrelia
- Borrelia afzelii
- Borrelia burgdorferi
- Borrelia garinii
- Borrelia miyamotoi
- Botfly
- Botryomycosis
- Botulism
- Bovine coronavirus
- Bovine herpesvirus 1
- Bovine spongiform encephalopathy
- branched DNA assay
- Brome mosaic virus
- Bromoviridae
- Bronchiolitis
- Broth microdilution
- Brucella suis
- Brucellosis
- Brugia
- Brugia malayi
- Brugia timori
- BST2
- Bubonic plague
- Budding
- Buffalopox
- Bundibugyo ebolavirus
- Bunyaviridae
- Burkholderia cepacia
- Burkholderia cepacia complex
- Buruli ulcer
- BVD
- BZLF1
- CagA
- Caliciviridae
- Calicivirus
- California encephalitis
- Campylobacter enteritis
- Campylobacteriosis
- Canarypox
- Candida albicans
- Candida auris
- Candida krusei
- Candida tropicalis
- Canine adenovirus
- Canine coronavirus
- Canine distemper
- Canine distemper virus
- Canine leishmaniasis
- Cap snatching
- Capillaria
- Capsid protein
- Capsids
- Capsomere
- Cardiovascular syphilis
- Carrion's disease
- Casoni test
- Cat bite
- Cat fleas
- Caudovirales
- Cauliflower mosaic virus
- CAUTI
- Centipede bite
- Centor criteria
- Cercariae
- Cerebral malaria
- Cervarix
- Chagas cardiomyopathy
- Chagas disease
- Chancroid
- Chickenpox
- Chickenpox vaccine
- Chikungunya
- Chikungunya virus
- Chlamydia
- Chlamydia antibodies
- Chlamydia infection
- Chlamydia pneumoniae
- Chlamydia psittaci
- Chlamydia trachomatis
- Chlamydiaceae
- Chlamydial pneumonia
- Chlamydiales
- Chlamydophila
- Chlamydophila pneumoniae
- Chlamydophila psittaci
- Chlorobi
- Cholera
- Chromoblastomycosis
- Chromomycosis
- Chronic active EBV infection
- Chronic active hepatitis
- Chronic bacterial prostatitis
- Chronic hepatitis
- Chronic hepatitis B
- Chronic pulmonary aspergillosis
- Chronic viral hepatitis
- Chronic wasting disease
- Circovirus
- Circumsporozoite protein
- Citrobacter
- Citrobacter koseri
- CJD
- Classical swine fever virus
- Clonorchiasis
- Co-option
- Coccidioides immitis
- Coccidioides posadasii
- Coccidioidin
- Coccidioidomycosis
- Coccidiosis
- Cochliomyia hominivorax
- Coinfection
- Colanic acid
- Cold
- Cold sores
- Colicin
- Coliphages
- Colorado tick fever
- Colorado tick fever virus
- Common cold
- Communicable diseases
- Condoms
- Condyloma
- Condyloma acuminatum
- Congenital chloride diarrhea
- Congenital chloride diarrhoea
- Congenital cytomegalovirus infection
- Congenital rubella syndrome
- Congenital syphilis
- Congenital toxoplasmosis
- Conidiobolomycosis
- Contagious disease
- Cord factor
- Cordon sanitaire
- Core protein
- Coronaviridae
- Coronavirinae
- Coronavirus
- Coronavirus disease
- Corynebacterium diphtheriae
- Corynebacterium urealyticum
- Corynebacterium xerosis
- Cosavirus
- Cottontail rabbit papillomavirus
- COVID
- COVID-19
- Cowpox
- Cowpox virus
- Coxiella
- Coxiella burnetii
- Coxiellaceae
- Coxsackie A virus
- Coxsackie b virus
- Coxsackievirus
- Creutzfeldt-Jakob disease
- Crimean Congo Hemorrhagic Fever
- Crimean-Congo hemorrhagic fever
- Crimean-Congo hemorrhagic fever virus
- Crithidia
- Crithidia fasciculata
- Crithidia luciliae
- Cross infection
- Croup
- Cryptococcal meningitis
- Cryptococcosis
- Cryptococcus gattii
- Cryptococcus neoformans
- Cryptosporidiosis
- Cryptosporidium
- Ctenocephalides felis
- Cucumber mosaic virus
- Culex
- Culex tarsalis
- Culex tritaeniorhynchus
- Culicidae
- Cutaneous larva migrans
- Cutaneous leishmaniasis
- Cutibacterium acnes
- Cyanophages
- Cyclospora
- Cysticercosis
- Cystitis
- Cystoisospora
- Cytomegalovirus colitis
- Cytomegalovirus retinitis
- Decolonization
- Deltaretrovirus
- Deltavirus
- Demodex
- Demodex brevis
- Demodex folliculorum
- Demodicosis
- Dengue
- Dengue fever
- Dengue hemorrhagic fever
- Dengue shock syndrome
- Dengue virus
- Dental abscess
- Dependoparvovirus
- Dependovirus
- Dermacentor
- Dermacentor reticulatus
- Dermanyssus gallinae
- Dermatophagoides farinae
- Dermatophagoides pteronyssinus
- Dicistroviridae
- Dicrocoelium dendriticum
- Dientamoeba
- Dientamoeba fragilis
- Dietzia
- Diffuse infiltrative lymphocytosis syndrome
- Digenea
- Dimorphic fungi
- Diphtheria
- Diphtheria antitoxin
- Diphtheria toxoid
- Diphtheria vaccine
- Diphyllobothriasis
- Dirofilaria
- Dirofilaria immitis
- Dirofilariasis
- Discitis
- Disease transmission
- Disease X
- Disseminated herpes zoster
- double stranded RNA virus
- Double-stranded RNA viruses
- DPT vaccine
- Dracunculiasis
- Dracunculus
- Dracunculus medinensis
- Drugs for Neglected Diseases Initiative
- Duck hepatitis B virus
- Dust mites
- Dysentery
- Eagle effect
- Ear mites
- Eastern equine encephalitis
- Eastern equine encephalitis virus
- Ebola
- Ebola hemorrhagic fever
- Ebola virus
- Ebolavirus
- Echinococcosis
- Echovirus
- Ectoparasites
- Ectoparasitic infestation
- Ectoparasiticides
- Ectoparasitism
- Ectromelia virus
- Eggerthella
- Ehrlichia
- Ehrlichia canis
- Ehrlichia chaffeensis
- Ehrlichia ewingii
- Eimeria
- Eimeriidae
- El Tor
- ELISA
- Embecovirus
- Emergent viruses
- Emerging infectious diseases
- Emerging viruses
- Emphysematous cystitis
- Endolimax nana
- Endoparasite
- Endoparasites
- Entamoeba
- Entamoeba coli
- Entamoeba dispar
- Entamoeba gingivalis
- Entamoeba histolytica
- Enteric virus
- enteroaggregative Escherichia coli
- Enterobiasis
- Enterobius
- Enterobius vermicularis
- Enterococcus durans
- Enterococcus faecalis
- Enterococcus faecium
- Enterococcus gallinarum
- Enterococcus hirae
- Enterococcus raffinosus
- Enterohemorrhagic Escherichia coli
- Enteropathogen
- Enteropathogenic Escherichia coli
- Enterotoxigenic Escherichia coli
- Enterovirus
- Enterovirus 71
- Enterovirus D
- Enterovirus D68
- Entomopathogenic nematodes
- Environmental enteropathy
- Enzyme immunoassay
- Enzyme linked immunosorbent assay
- Enzyme-linked immunosorbent assay
- Epidemic curve
- Epidemic typhus
- Epidemics
- Epidural abscess
- Epiglottitis
- Epimastigote
- Equine influenza
- Erysipelas
- Erysipelothrix
- Erysipelothrix rhusiopathiae
- Erysipelotrichia
- Erythroparvovirus
- Escherichia coli
- Escherichia coli O157
- Eumycetoma
- Fascioliasis
- Fasciolopsis buski
- Fasciolosis
- Febris
- Fecal oral route
- Feline calicivirus
- Feline infectious peritonitis
- Feline leukemia virus
- Feline panleukopenia
- Fever of unknown origin
- Filariasis
- Filarioidea
- Filoviridae
- Filovirus
- Fitz-Hugh-Curtis syndrome
- FIV
- Flaviviridae
- Flavivirus
- Flu
- Flu season
- Flu-like symptoms
- Flu-like syndrome
- FokI
- Fomites
- Foot and mouth disease
- Foot rot
- Foot-and-mouth disease
- Foot-and-mouth disease virus
- Francisella tularensis
- FTA-ABS
- Fungal infections
- Fungal pneumonia
- Fungi
- Fusion mechanism
- Fusobacteria
- Gain-of-function research
- Gammaherpesvirinae
- Gammaproteobacteria
- Gammaretrovirus
- Gardnerella
- Gardnerella vaginalis
- Gasterophilus
- Gastroenteritis
- Genital herpes
- Genital ulcer
- Genital warts
- Germ theory
- Germ theory of disease
- Giardia intestinalis
- Giardiasis
- Gibbon ape leukemia virus
- Glandular fever
- Global Influenza Surveillance and Response System
- Gnathostoma
- Gnathostoma spinigerum
- Gnathostomiasis
- Google Flu Trends
- Gordonia
- Granuloma inguinale
- Granulomatous amoebic encephalitis
- Guinea worm eradication
- Gumma
- Gyrodactylus salaris
- Haemonchus contortus
- HaloTag
- Handshakes
- Hantaviridae
- Hantavirus
- Hantavirus infection
- Hantavirus pulmonary syndrome
- Haverhill fever
- Head lice
- Healthcare-associated pneumonia
- Heligmosomoides polygyrus
- Helminth
- Helminthiasis
- Helper viruses
- Hemagglutination inhibition
- Hemorrhagic fever
- Hemozoin
- Hendra virus
- Henipavirus
- Hepadnaviridae
- Hepatitis
- Hepatitis A
- hepatitis A vaccine
- Hepatitis A virus
- Hepatitis B
- Hepatitis B vaccination
- hepatitis B vaccine
- Hepatitis B virus
- Hepatitis C
- Hepatitis C virus
- Hepatitis D
- Hepatitis D virus
- Hepatitis delta virus
- Hepatitis E
- Hepatitis G virus
- Hepeviridae
- Herelleviridae
- Herpes
- Herpes genitalis
- Herpes labialis
- Herpes simplex
- Herpes simplex virus
- Herpes simplex virus 2
- Herpes simplex virus type 1
- Herpes virus
- Herpes zoster
- Herpesvirales
- Herpesviridae
- Herpetic whitlow
- Heterophile antibody test
- Histoplasma capsulatum
- Histoplasmosis
- History of virology
- HIV
- HIV drug resistance
- HIV exceptionalism
- HIV tests
- Holoendemic
- Hong Kong flu
- Hong Kong influenza
- Hookworm
- Hookworm infection
- Horizontal gene transfer
- Horizontal transmission
- Hospital acquired pneumonia
- Hospital-acquired infections
- Host adaptation
- Host tropism
- Housefly
- HPTN 052
- HPV-positive oropharyngeal cancer
- HTLV
- HTLV-1
- HTLV-2
- Human bocavirus
- Human coronavirus 229e
- Human coronavirus nl63
- Human coronavirus oc43
- Human cytomegalovirus
- Human flea
- Human granulocytic anaplasmosis
- Human herpesvirus 1
- Human herpesvirus 5
- Human monocytic ehrlichiosis
- Human parainfluenza viruses
- Human parasites
- Human rhinovirus
- Human T lymphotropic virus 1
- Human T-lymphotropic virus
- Human T-lymphotropic virus 2
- Human trypanosomiasis
- Human virome
- Human-to-human transmission
- Hycanthone
- Hydatid disease
- Hyperendemic
- IHNV
- Infections
- Infectious bursal disease
- Infectious diarrhea
- Infectious diseases
- Infectious mononucleosis
- Infectious period
- Influenza
- Influenza A
- Influenza A virus
- Influenza B
- Influenza C virus
- Influenza virus
- Influenza-like illness
- Inhalational anthrax
- Insect bite
- Insect vector
- Integrase
- Intermittent fever
- Invasive candidiasis
- Iridoviridae
- IRIS
- Ischemic hepatitis
- Isolation
- Isolation ward
- Isospora
- Isosporiasis
- Ixodes holocyclus
- Ixodes scapularis
- Ixodida
- Jamestown Canyon virus
- Japanese encephalitis
- Junin virus
- Kala-azar
- KatG
- Kerteszia
- Kobuvirus
- Kocuria
- Koilocytes
- Koplik's spots
- Kunjin virus
- Kyasanur Forest disease
- Kyasanur Forest Disease Virus
- Laboratory-acquired infection
- Lampreys
- Langat virus
- Larva currens
- Larva migrans
- Laryngeal papillomatosis
- Laryngotracheobronchitis
- Lassa fever
- Lassa virus
- Leaky scanning
- Legionella pneumophila
- Legionellales
- Leishmania
- Leishmania amazonensis
- Leishmania braziliensis
- Leishmania donovani
- Leishmania infantum
- Leishmania major
- Leishmania tropica
- Leishmaniasis
- Lemierre's syndrome
- Lentiviruses
- Leprosarium
- Leprosy
- Leptomonas
- Leptospirosis
- Lipoarabinomannan
- Listeria monocytogenes
- Listeriosis
- Liver fluke
- Loa loa
- Long COVID
- Long-term nonprogressor
- Louping ill
- Louping ill virus
- Lumpy jaw
- Lutzomyia
- Lyme disease
- Lymphatic filariasis
- Lymphocytic choriomeningitis
- Lymphocytic choriomeningitis virus
- Lymphogranuloma venereum
- Lymphoid leucosis
- Lysogenic
- Lysogenic cycle
- Lysogeny
- Lytic cycle
- M protein
- Macrocephalus
- Malaria
- Malaria prophylaxis
- Malaria vaccine
- Mange
- Mansonella
- Mansonella ozzardi
- Mansonella perstans
- Marburg virus
- Marburg virus disease
- Marburgvirus
- Marek's disease
- Mast cell tumors
- Mastocytoma
- Matrix protein
- Measles
- Measles virus
- Meningococcal disease
- Meningococcemia
- Merbecovirus
- MERS
- Metacercaria
- Methylomonas
- Micrococcaceae
- Micrococcus
- Micrococcus luteus
- Microfilaria
- Microviridae
- Middle East Respiratory Syndrome Coronavirus
- Mimiviridae
- MMR vaccine
- Mollicutes
- Molluscum contagiosum
- Molluscum contagiosum virus
- Monkeypox
- Monkeypox virus
- Mononegavirales
- Mononucleosis
- Mosaic virus
- Mosquito bite
- Mosquito-borne diseases
- Mouse mammary tumor virus
- Mousepox
- Mouth ulcers
- Moxidectin
- MRSA
- Mucormycosis
- Multicenter AIDS Cohort Study
- Multidrug resistance
- Multiple drug resistance
- Multiple myeloma
- Multiple sex partners
- Multiplicity of infection
- Mumps
- Mumps virus
- Murine hepatitis virus
- Murine leukemia virus
- Murray Valley encephalitis
- Mycetoma
- Mycobacteriaceae
- Mycobacterium leprae
- Mycobacterium lepromatosis
- Mycobacterium tuberculosis complex
- Mycoplasmataceae
- Mycosis
- Myeloma
- Myiasis
- Myoviridae
- Myxoma virus
- Myxomatosis
- Naegleria fowleri
- Nairoviridae
- Nanobacterium
- National Influenza Centers
- Necator americanus
- Necatoriasis
- Necrotizing fasciitis
- Necrotizing pneumonia
- Nef
- negative strand RNA virus
- Negativicutes
- Neglected tropical diseases
- Neisseriaceae
- Nematode infection
- Neonatal conjunctivitis
- Neonatal infection
- Neonatal tetanus
- Neorickettsia
- Neospora
- Neuroborreliosis
- Neurocysticercosis
- Neurosyphilis
- Neurotropism
- Neurovirology
- New Delhi metallo-beta-lactamase 1
- Newcastle disease virus
- Nidovirales
- Nifurtimox-eflornithine combination treatment
- Nipah virus
- Nipah virus infection
- Nippostrongylus brasiliensis
- Nocardia asteroides
- Nocardia brasiliensis
- Nocardia farcinica
- Nocardiaceae
- Nocardiosis
- Nodaviridae
- Noma
- Non-gonococcal urethritis
- Nontreponemal
- Norovirus
- Norwalk virus
- Nosocomial
- Notifiable diseases
- Novel coronavirus
- Nsp12
- NSP2
- NSP4
- NSP5
- NSP6
- Nucleocapsid
- Nucleocapsid protein
- O157
- Obligate parasite
- Oesophagostomum
- Omphalitis
- Omsk hemorrhagic fever
- Onchocerca
- Onchocerca volvulus
- Onchocerciasis
- Onchodermatitis
- One Health
- Ophthalmia neonatorum
- Ophthalmia nodosa
- Opisthorchiasis
- Opisthorchis felineus
- Opisthorchis viverrini
- Oral herpes
- Oral rehydration solution
- Orbital cellulitis
- Orbivirus
- Orf virus
- ORF1ab
- ORF3a
- ORF6
- ORF7b
- ORF8
- ORF9b
- Orientia
- Original antigenic sin
- Ornithodoros savignyi
- Orphan virus
- Orthobunyavirus
- Orthohepadnavirus
- Orthomyxoviridae
- Orthopoxvirus
- Orthoretrovirinae
- Osteomyelitis
- Overwhelming post-splenectomy infection
- Pandemic prevention
- Pandemrix
- Panstrongylus
- Papaya mosaic virus
- Papillomaviridae
- Papillomavirus
- Papovavirus
- Paracoccidioides
- Paracoccidioides brasiliensis
- Paracoccidioides lutzii
- Paracoccidioidomycosis
- Paragonimiasis
- Paragonimus
- Paragonimus westermani
- Parainfluenza
- Paralytic polio
- Paralytic poliomyelitis
- Paramyxoviridae
- Parapoxvirus
- Parasitic
- Parasitic diseases
- Parasitic infections
- Parasitoid wasps
- Paratyphoid fever
- Parechovirus
- Parinaud's oculoglandular syndrome
- Partitiviridae
- Partner notification
- Parvoviridae
- Parvovirinae
- Parvovirus B19
- Pasteurella multocida
- Pathogenic fungi
- Pathogenic microbes
- Pathogenic organism
- Pathogenicity
- Pathogens
- Pediculosis
- Pediculosis capitis
- PEDV
- Pelvic inflammatory disease
- Pentavalent vaccine
- PEP
- Perihepatitis
- Periodontal abscess
- Periorbital cellulitis
- Peritonsillar abscess
- Permissive cells
- Persistent infection
- Persister cells
- Pertactin
- Pertussis
- Pertussis vaccine
- PfEMP1
- Phage therapy
- Pharyngitis
- Phenuiviridae
- Phlebotomus
- Phytophthora infestans
- Phytoreovirus
- Picobirnavirus
- Picornaviridae
- Picornaviruses
- Pinta
- Pinworms
- Pisuviricota
- Plague
- Plague of Athens
- Plant viruses
- Plaque forming units
- Plasmepsin
- Plasmodiidae
- Plasmodium
- Plasmodium berghei
- Plasmodium chabaudi
- Plasmodium cynomolgi
- Plasmodium falciparum
- Plasmodium malariae
- Plasmodium ovale
- Plasmodium vivax
- Plasmodium yoelii
- PML
- Pneumocystis carinii
- Pneumocystis jirovecii
- Pneumocystosis
- Pneumonic plague
- Pneumoviridae
- Podoviridae
- Polio
- Polio eradication
- polio in Pakistan
- Polio vaccine
- Poliomyelitis
- Poliovirus
- Porcine epidemic diarrhoea
- Post exposure prophylaxis
- Post-COVID
- Post-exertional malaise
- Post-kala-azar dermal leishmaniasis
- Pott disease
- Potyviridae
- Powassan virus
- Pox viruses
- Poxviridae
- Pre-exposure prophylaxis
- Pre-integration complex
- Prevotella bivia
- Primary amoebic meningoencephalitis
- Primary central nervous system lymphoma
- Primary tuberculosis
- Prion
- Prion diseases
- Prions
- Priority review
- Prophages
- Propionibacterium
- Propionibacterium acnes
- Propionibacterium freudenreichii
- Protective isolation
- Protothecosis
- Protozoa
- Protozoal infection
- Protozoan
- Proviruses
- Pseudomonadales
- Pseudorabies
- Pseudotyping
- Psoroptes cuniculi
- Psoroptic mange
- Pubic lice
- Pulmonary tuberculosis
- Puumala orthohantavirus
- PVSRIPO
- Pyaemia
- Pyomyositis
- Q fever
- Quarantine
- Quasispecies
- Rabbit Hemorrhagic Disease
- Rabies transmission
- Rabies vaccine
- Rabies virus
- Rapid influenza diagnostic test
- Rat-bite fever
- RaTG13
- Real-time quaking-induced conversion
- Reassortment
- Recombinant virus
- Recurrent respiratory papillomatosis
- Red ribbon
- Reduviidae
- Relapsing fever
- Reovirus
- Resistance
- Resistome
- Respiratory droplets
- Respiratory infections
- Respiratory tract infections
- Reston virus
- Restriction modification system
- Reutericyclin
- Rhabdoviridae
- Rhinosporidium seeberi
- Rhinovirus
- Rhipicephalus microplus
- Rhizopus oryzae
- Rhodnius
- Rhodococcus
- Riboviria
- Rickettsia conorii
- Rickettsia helvetica
- Rickettsia prowazekii
- Rickettsia rickettsii
- Rickettsia typhi
- Rickettsiaceae
- Rickettsiales
- Rickettsiosis
- Rift Valley fever virus
- Rinderpest
- Risky sexual behavior
- Ross River virus
- Rotaviral gastroenteritis
- Rotavirus
- Rotavirus gastroenteritis
- Rotavirus vaccine
- Rothia
- Rothia mucilaginosa
- Rous sarcoma virus
- RPR
- Rubella
- Rubella vaccine
- Rubella virus
- Rudiviridae
- Rule of Six
- Sabin-Feldman dye test
- Salivirus
- Salmonella Enteritidis
- Salmonella Typhi
- Salmonella Typhimurium
- Salmonellosis
- Sarcocystidae
- Sarcocystis
- Sarcoptes scabiei
- SARS coronavirus
- SARS virus
- SARS-CoV-2
- Satellite viruses
- Scabies
- Scarlet fever
- Scedosporiosis
- Scedosporium apiospermum
- Schistosoma
- Schistosoma japonicum
- Schistosoma mansoni
- Schistosomatidae
- Schistosomiasis
- Scrapie
- Scrub typhus
- Secondary syphilis
- Sedoreovirinae
- Selectivity factor
- Semliki Forest virus
- Sendai virus
- Sentinel surveillance
- Sepsis
- Sepsis Six
- Septicemia
- Serial passage
- Serodiscordant
- Serosorting
- Severe acute respiratory syndrome coronavirus 2
- Severe fever with thrombocytopenia syndrome
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- Soil-transmitted helminthiasis
- Soybean mosaic virus
- Spanish influenza
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- Spillover
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- STARI
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- Symptoms of COVID-19
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- Zoster sine herpete