369 | Influenza A virus |
366 | Animals |
340 | Humans |
235 | Influenza, Human |
210 | Influenza A Virus, H2N2 Subtype |
174 | Influenza Vaccines |
146 | Mice |
143 | Antibodies, Viral |
111 | Female |
105 | Neuraminidase |
104 | Orthomyxoviridae Infections |
104 | Influenza A Virus, H1N1 Subtype |
88 | Viral Proteins |
88 | Influenza A Virus, H3N2 Subtype |
82 | Vaccines, Attenuated |
81 | Virus Replication |
80 | Antigens, Viral |
78 | Hemagglutinins, Viral |
74 | Adult |
71 | Hemagglutinin Glycoproteins, Influenza Virus |
69 | Mice, Inbred BALB C |
66 | Disease Outbreaks |
63 | Orthomyxoviridae |
61 | Male |
59 | Molecular Sequence Data |
59 | Influenza in Birds |
58 | Cold Temperature |
57 | Adolescent |
55 | Influenza A Virus, H5N1 Subtype |
54 | RNA, Viral |
53 | Hemagglutination Inhibition Tests |
53 | Chick Embryo |
52 | Reassortant Viruses |
51 | Child |
51 | Antiviral Agents |
50 | Mutation |
49 | Middle Aged |
47 | Cell Line |
47 | Birds |
44 | Amino Acid Sequence |
43 | Recombination, Genetic |
43 | Genes, Viral |
41 | Cross Reactions |
40 | Lung |
39 | Child, Preschool |
38 | Dogs |
36 | Vaccination |
36 | Influenza B virus |
36 | Ferrets |
36 | Epitopes |
34 | Pandemics |
34 | Chickens |
33 | Antibodies, Monoclonal |
30 | Base Sequence |
30 | Aged |
28 | Neutralization Tests |
28 | Infant |
27 | Adaptation, Physiological |
26 | Viral Matrix Proteins |
26 | Swine |
26 | Phylogeny |
26 | History, 20th Century |
24 | T-Lymphocytes, Cytotoxic |
23 | Virulence |
23 | Time Factors |
23 | Phenotype |
22 | Peptides |
21 | Temperature |
21 | Cells, Cultured |
21 | Antibodies, Neutralizing |
20 | Disease Models, Animal |
19 | Zoonoses |
19 | Young Adult |
19 | Models, Molecular |
19 | Immunization |
18 | Amino Acid Substitution |
18 | Administration, Intranasal |
17 | Species Specificity |
17 | Seasons |
17 | Genome, Viral |
16 | Russia |
16 | Protein Binding |
16 | Ducks |
16 | DNA, Viral |
15 | Nucleoproteins |
15 | Electrophoresis, Polyacrylamide Gel |
14 | Lymphocyte Activation |
14 | Influenza A Virus, H9N2 Subtype |
14 | Genetic Variation |
14 | Evolution, Molecular |
14 | Antibody Specificity |
13 | Viral Plaque Assay |
13 | Structure-Activity Relationship |
13 | Sequence Analysis, DNA |
13 | RNA Replicase |
13 | Genotype |
12 | Vaccines, Synthetic |
12 | United States |
12 | T-Lymphocytes |
12 | Microbial Sensitivity Tests |
12 | Cricetinae |
12 | China |
12 | CD8-Positive T-Lymphocytes |
12 | CD4-Positive T-Lymphocytes |
12 | Binding Sites |
11 | Vaccines, Inactivated |
11 | Sequence Alignment |
11 | Reverse Transcriptase Polymerase Chain Reaction |
11 | Receptors, Virus |
11 | Rabbits |
11 | Infant, Newborn |
10 | Sensitivity and Specificity |
10 | Recombinant Proteins |
10 | Mutation, Missense |
10 | Mice, Inbred CBA |
10 | Mice, Inbred C57BL |
10 | Influenza A Virus, H7N9 Subtype |
10 | Influenza A Virus, H5N2 Subtype |
10 | Hong Kong |
10 | Enzyme-Linked Immunosorbent Assay |
10 | B-Lymphocytes |
10 | Amantadine |
10 | Adamantane |
9 | Rimantadine |
9 | Protein Conformation |
9 | Poultry |
9 | Polymerase Chain Reaction |
9 | Oseltamivir |
9 | Models, Biological |
9 | Lymphocytes |
9 | Interferon-gamma |
9 | Immunoglobulin G |
9 | Immunoglobulin A |
9 | Immunoenzyme Techniques |
9 | Immunization, Secondary |
9 | Hydrogen-Ion Concentration |
9 | Hemagglutinins |
9 | Global Health |
9 | Drug Resistance, Viral |
9 | Cross Protection |
9 | Computational Biology |
9 | Antibody Formation |
9 | Aged, 80 and over |
9 | Adaptation, Biological |
8 | Viral Nonstructural Proteins |
8 | Swine Diseases |
8 | Sialic Acids |
8 | Sequence Homology, Amino Acid |
8 | Pregnancy |
8 | Nucleic Acid Hybridization |
8 | Hemagglutination Tests |
8 | Enzyme Inhibitors |
8 | Drug Evaluation, Preclinical |
8 | Dose-Response Relationship, Drug |
8 | Cytokines |
8 | Chlorocebus aethiops |
8 | Antigenic Variation |
7 | Virus Shedding |
7 | Risk Factors |
7 | Prevalence |
7 | Poultry Diseases |
7 | Pneumonia, Viral |
7 | Mutagenesis, Site-Directed |
7 | Mice, Transgenic |
7 | Mice, Inbred Strains |
7 | Japan |
7 | Influenza A Virus, H7N7 Subtype |
7 | Immune Sera |
7 | Histocompatibility Antigens Class I |
7 | Europe |
7 | Epitopes, T-Lymphocyte |
7 | Drug Resistance, Microbial |
7 | Disease Reservoirs |
7 | Crystallography, X-Ray |
7 | Computer Simulation |
7 | Bird Diseases |
7 | Biological Evolution |
7 | Asia |
7 | Age Factors |
7 | Adsorption |
7 | Adjuvants, Immunologic |
6 | Virus Cultivation |
6 | Transfection |
6 | Trachea |
6 | Survival Analysis |
6 | Seroepidemiologic Studies |
6 | Respiratory System |
6 | Radioimmunoassay |
6 | RNA, Messenger |
6 | Polysaccharides |
6 | Plasmids |
6 | Nasal Mucosa |
6 | Molecular Structure |
6 | Lymph Nodes |
6 | Kinetics |
6 | Immunologic Memory |
6 | Dendritic Cells |
6 | Cytotoxicity, Immunologic |
6 | Conserved Sequence |
6 | Cloaca |
6 | Cell Movement |
6 | Animals, Wild |
5 | Zanamivir |
5 | World Health Organization |
5 | Virion |
5 | Viral Load |
5 | Viral Core Proteins |
5 | Urban Population |
5 | Survival Rate |
5 | Spleen |
5 | Rats |
5 | Population Surveillance |
5 | North America |
5 | Mesocricetus |
5 | Kidney |
5 | Interferons |
5 | Immunization Schedule |
5 | Immunity |
5 | Immunity, Cellular |
5 | Hemagglutination, Viral |
5 | Erythrocytes |
5 | Double-Blind Method |
5 | DNA Primers |
5 | Culture Techniques |
5 | Antigens, Surface |
5 | Antigen-Antibody Complex |
5 | Age Distribution |
4 | Virology |
4 | Viral Vaccines |
4 | Vaccinia virus |
4 | USSR |
4 | Treatment Outcome |
4 | Stochastic Processes |
4 | Serial Passage |
4 | Sequence Analysis, Protein |
4 | Reverse Genetics |
4 | Recombinant Fusion Proteins |
4 | Pregnancy Complications, Infectious |
4 | Oligopeptides |
4 | Nose |
4 | Newcastle disease virus |
4 | Mutant Proteins |
4 | Molecular Dynamics Simulation |
4 | Mice, Inbred C3H |
4 | Madin Darby Canine Kidney Cells |
4 | Lung Diseases |
4 | Killer Cells, Natural |
4 | Influenza A Virus, H3N8 Subtype |
4 | India |
4 | Immunoglobulins |
4 | Immunodiffusion |
4 | Hybridomas |
4 | Hot Temperature |
4 | Horses |
4 | History, 21st Century |
4 | History, 19th Century |
4 | History, 18th Century |
4 | Hemagglutination |
4 | Healthy Volunteers |
4 | HeLa Cells |
4 | Guinea Pigs |
4 | Glycoproteins |
4 | Gene Expression |
4 | Fever |
4 | Dose-Response Relationship, Immunologic |
4 | Disaster Planning |
4 | DNA, Recombinant |
4 | Cluster Analysis |
4 | Cloning, Molecular |
4 | Cell Membrane |
4 | Carnivora |
4 | Bronchoalveolar Lavage Fluid |
4 | Bromelains |
4 | Biosensing Techniques |
4 | Australia |
4 | Antibodies, Anti-Idiotypic |
4 | Amino Acids |
4 | Algorithms |
4 | Adoptive Transfer |
4 | Administration, Oral |
4 | Acclimatization |
3 | Viral Envelope Proteins |
3 | Vaccines, DNA |
3 | United Kingdom |
3 | Tumor Cells, Cultured |
3 | Trypsin |
3 | Thymus Gland |
3 | Thermodynamics |
3 | Technology, Pharmaceutical |
3 | Spain |
3 | Severity of Illness Index |
3 | Serotyping |
3 | Selection, Genetic |
3 | Saimiri |
3 | Risk Assessment |
3 | Ribonucleoproteins |
3 | Ribavirin |
3 | Reproducibility of Results |
3 | Recurrence |
3 | Receptors, Cell Surface |
3 | Receptors, Antigen, T-Cell |
3 | Real-Time Polymerase Chain Reaction |
3 | Protein Structure, Secondary |
3 | Pneumonia |
3 | Oligosaccharides |
3 | New Jersey |
3 | Nasopharynx |
3 | N-Acetylneuraminic Acid |
3 | Moscow |
3 | Models, Theoretical |
3 | Models, Genetic |
3 | Microarray Analysis |
3 | Macrophages |
3 | Macaca mulatta |
3 | Lymphocyte Count |
3 | Lethal Dose 50 |
3 | Intestines |
3 | Interferon-beta |
3 | Interferon Inducers |
3 | Injections, Intramuscular |
3 | Influenzavirus C |
3 | Incidence |
3 | In Vitro Techniques |
3 | Immunity, Mucosal |
3 | Immunity, Innate |
3 | Immunity, Humoral |
3 | Host-Pathogen Interactions |
3 | History, 17th Century |
3 | History, 16th Century |
3 | Histocompatibility Antigens Class II |
3 | Hemolysis |
3 | Hemadsorption |
3 | Health Planning |
3 | HEK293 Cells |
3 | Glycosylation |
3 | Genomic Instability |
3 | Genetic Complementation Test |
3 | Gemfibrozil |
3 | Fluorescent Antibody Technique |
3 | Evaluation Studies as Topic |
3 | Escherichia coli |
3 | Epidemiologic Methods |
3 | Enzyme Stability |
3 | Eggs |
3 | Drug Administration Schedule |
3 | Defective Viruses |
3 | DNA |
3 | DNA, Complementary |
3 | DNA Restriction Enzymes |
3 | Cytotoxicity Tests, Immunologic |
3 | Cytopathogenic Effect, Viral |
3 | Complement Fixation Tests |
3 | Codon |
3 | Clone Cells |
3 | Clinical Trials as Topic |
3 | Chromatography, Gel |
3 | Centrifugation, Density Gradient |
3 | Cattle |
3 | CD8 Antigens |
3 | Brain |
3 | Body Weight |
3 | Blotting, Western |
3 | Blood |
3 | Biological Transport |
3 | Apoptosis |
3 | Antigen Presentation |
3 | Antibodies, Heterophile |
3 | Africa |
2 | Water |
2 | Virus Diseases |
2 | Virus Attachment |
2 | Virulence Factors |
2 | Viral Structural Proteins |
2 | Vero Cells |
2 | Ubiquitin-Protein Ligases |
2 | Turbinates |
2 | Transcription, Genetic |
2 | Superoxides |
2 | Sulfur Radioisotopes |
2 | Software |
2 | Serologic Tests |
2 | Sequence Deletion |
2 | Sentinel Surveillance |
2 | Seals, Earless |
2 | Romania |
2 | Risk |
2 | Restriction Mapping |
2 | Respiratory Mucosa |
2 | Pyrans |
2 | Public Health |
2 | Proteome |
2 | Protein Structure, Tertiary |
2 | Protein Denaturation |
2 | Prodrugs |
2 | Prenatal Exposure Delayed Effects |
2 | Polysorbates |
2 | Polymers |
2 | Polyamines |
2 | Piperidines |
2 | Pharynx |
2 | Phagocytosis |
2 | Peptide Library |
2 | Ovum |
2 | Oropharynx |
2 | Occupational Exposure |
2 | Nucleocapsid Proteins |
2 | Nucleic Acid Conformation |
2 | Nitric Oxide |
2 | Nitric Oxide Synthase |
2 | New York |
2 | Neutrophils |
2 | Molecular Mimicry |
2 | Molecular Conformation |
2 | Models, Animal |
2 | Mitogens |
2 | Microscopy, Electron, Scanning |
2 | Mice, Knockout |
2 | Mice, Inbred DBA |
2 | Mexico |
2 | Methods |
2 | Methionine |
2 | Membrane Proteins |
2 | Membrane Fusion |
2 | Mass Vaccination |
2 | Major Histocompatibility Complex |
2 | Macromolecular Substances |
2 | Macaca |
2 | Macaca fascicularis |
2 | Lymphokines |
2 | Longitudinal Studies |
2 | Liver |
2 | Ligands |
2 | Leukocytes |
2 | Leukocytes, Mononuclear |
2 | L Cells |
2 | Ion Channels |
2 | Interleukin-6 |
2 | Interleukin-2 |
2 | Interferon Type I |
2 | Injections, Intravenous |
2 | Injections, Intraperitoneal |
2 | Injections, Intradermal |
2 | Inhibitory Concentration 50 |
2 | Influenza A Virus, H1N2 Subtype |
2 | Indoles |
2 | Immunosuppressive Agents |
2 | Immunophenotyping |
2 | Immunoglobulin M |
2 | Immunoglobulin Fab Fragments |
2 | Immunoglobulin A, Secretory |
2 | Immunoblotting |
2 | Immunization, Passive |
2 | Immune Tolerance |
2 | Hydroxymethylglutaryl-CoA Reductase Inhibitors |
2 | Host Specificity |
2 | Hospitalization |
2 | History, Medieval |
2 | H-2 Antigens |
2 | Guanidines |
2 | Germany |
2 | Germany, East |
2 | Germ-Free Life |
2 | Genetic Vectors |
2 | Free Radicals |
2 | Flow Cytometry |
2 | Finland |
2 | Fibroblasts |
2 | Feces |
2 | Family Characteristics |
2 | Ethyl Ethers |
2 | Epitope Mapping |
2 | Epithelial Cells |
2 | Epidemics |
2 | Enterovirus B, Human |
2 | England |
2 | Endocytosis |
2 | Electrophoresis |
2 | Electron Microscope Tomography |
2 | Electric Impedance |
2 | Ecology |
2 | Drugs, Chinese Herbal |
2 | Drug-Related Side Effects and Adverse Reactions |
2 | Drug Stability |
2 | Drug Design |
2 | Down-Regulation |
2 | Databases, Nucleic Acid |
2 | DNA-Directed RNA Polymerases |
2 | DNA Mutational Analysis |
2 | Cryoelectron Microscopy |
2 | Coturnix |
2 | Communicable Disease Control |
2 | Coinfection |
2 | Cohort Studies |
2 | Chimera |
2 | Chemistry |
2 | Chemical Phenomena |
2 | Cell Survival |
2 | Cell Fusion |
2 | Cell Culture Techniques |
2 | Cell Adhesion |