66 | Humans |
37 | Animals |
31 | Influenza, Human (epidemiology) |
21 | Influenza, Human (virology) |
20 | Influenza A virus (genetics) |
16 | Female |
16 | Disease Outbreaks |
15 | Molecular Sequence Data |
13 | Influenza A virus (immunology) |
13 | Adult |
12 | Phylogeny |
12 | Influenza, Human (prevention & control) |
11 | Influenza |
11 | Human |
10 | Middle Aged |
10 | Influenza A Virus, H2N2 Subtype (immunology) |
10 | Epidemiology |
10 | Birds |
10 | Amino Acid Sequence |
10 | Aged |
10 | Adolescent |
9 | Male |
9 | Influenza, Human (transmission) |
9 | Child, Preschool |
8 | Viral Proteins (genetics) |
8 | Neuraminidase (genetics) |
8 | Influenza A virus (pathogenicity) |
8 | Influenza A Virus, H3N2 Subtype |
8 | Influenza A Virus, H2N2 Subtype |
8 | History, 20th Century |
8 | Child |
7 | Models, Molecular |
7 | Mice |
7 | Influenza, Human (history) |
7 | Influenza in Birds (virology) |
7 | Influenza A virus (physiology) |
7 | Infant |
7 | Hemagglutinin Glycoproteins, Influenza Virus (genetics) |
7 | Hemagglutinin Glycoproteins, Influenza Virus (chemistry) |
7 | Antibodies, Viral (blood) |
6 | Reassortant Viruses (genetics) |
6 | Orthomyxoviridae Infections (virology) |
6 | Influenza, Human (immunology) |
6 | Influenza in Birds (epidemiology) |
6 | Influenza Vaccines (immunology) |
6 | Influenza A |
6 | Influenza A virus |
6 | Influenza A virus (enzymology) |
6 | Influenza A virus (classification) |
6 | Hemagglutination Inhibition Tests |
6 | Base Sequence |
5 | Young Adult |
5 | Swine |
5 | Species Specificity |
5 | Pandemics |
5 | Orthomyxoviridae Infections (immunology) |
5 | Influenza, Human (mortality) |
5 | Influenza A virus (isolation & purification) |
5 | Influenza A Virus, H2N2 Subtype (genetics) |
5 | Hemagglutinin Glycoproteins, Influenza Virus (metabolism) |
5 | Ferrets |
5 | Evolution, Molecular |
5 | Biological Evolution |
5 | Antibodies, Viral (immunology) |
4 | Zoonoses (virology) |
4 | Zoonoses (epidemiology) |
4 | Virus Replication |
4 | Sequence Analysis, DNA |
4 | Sequence Alignment |
4 | Protein Binding |
4 | Orthomyxoviridae Infections (prevention & control) |
4 | Neutralization Tests |
4 | Neuraminidase (metabolism) |
4 | Neuraminidase (immunology) |
4 | Mutation |
4 | Mice, Inbred BALB C |
4 | Influenza Vaccines (administration & dosage) |
4 | Influenza A Virus, H3N2 Subtype (genetics) |
4 | Influenza A Virus, H2N2 Subtype (isolation & purification) |
4 | Influenza A Virus, H1N1 Subtype |
4 | Hong Kong (epidemiology) |
4 | Hemagglutinin Glycoproteins, Influenza Virus (immunology) |
4 | Epidemic |
4 | Dogs |
4 | Disease Outbreaks (history) |
4 | Cell Line |
4 | Amino Acid Substitution |
3 | Zoonoses (transmission) |
3 | Viral Proteins (chemistry) |
3 | United States (epidemiology) |
3 | Transmission from animal to man |
3 | Swine (virology) |
3 | Subtype |
3 | Seasons |
3 | Receptors, Virus (metabolism) |
3 | Orthomyxoviridae (genetics) |
3 | Origin |
3 | Neuraminidase (chemistry) |
3 | Mutation, Missense |
3 | Mortality |
3 | Models, Biological |
3 | Influenzavirus A |
3 | Influenza, Human (genetics) |
3 | Influenza in Birds (transmission) |
3 | Influenza A Virus, H5N1 Subtype (immunology) |
3 | Infection |
3 | Infant, Newborn |
3 | Hydrogen-Ion Concentration |
3 | Hong Kong |
3 | Hemagglutinins, Viral (immunology) |
3 | Exo-α-sialidase |
3 | Ducks (virology) |
3 | Disease Outbreaks (prevention & control) |
3 | Cross Reactions |
3 | Cluster Analysis |
3 | Chick Embryo |
3 | Case history |
3 | Antiviral Agents (therapeutic use) |
3 | Antibodies, Neutralizing (blood) |
3 | Aged, 80 and over |
3 | Age |
3 | Age Factors |
3 | Age Distribution |
2 | phylogenetic analysis |
2 | influenza virus |
2 | Zoonoses |
2 | Virulence |
2 | Viral Proteins (immunology) |
2 | Vaccines, Inactivated (immunology) |
2 | Time Factors |
2 | Swine Diseases (virology) |
2 | Survival Analysis |
2 | Spain (epidemiology) |
2 | Seroepidemiologic Studies |
2 | Sequence Homology, Nucleic Acid |
2 | Sequence Homology, Amino Acid |
2 | Risk Factors |
2 | Risk Assessment |
2 | Replication |
2 | Reassortant Viruses (immunology) |
2 | RNA, Viral (genetics) |
2 | Prevalence |
2 | Poultry |
2 | Poultry Diseases (virology) |
2 | Poultry (virology) |
2 | Pandemics (prevention & control) |
2 | Pandemic |
2 | Orthomyxoviridae Infections (veterinary) |
2 | Orthomyxoviridae Infections (pathology) |
2 | Nucleoproteins (genetics) |
2 | Neuraminidase (antagonists & inhibitors) |
2 | Mutagenesis, Site-Directed |
2 | Molecular evolution |
2 | Molecular epidemiology |
2 | Models, Genetic |
2 | Microbiology |
2 | Mammalia |
2 | Lung (immunology) |
2 | Influenzavirus |
2 | Influenza, Human (metabolism) |
2 | Influenza, Human (drug therapy) |
2 | Influenza in Birds (prevention & control) |
2 | Influenza in Birds (history) |
2 | Influenza in Birds (genetics) |
2 | Influenza Vaccines (therapeutic use) |
2 | Influenza Vaccines (adverse effects) |
2 | Influenza A virus (growth & development) |
2 | Influenza A Virus, H9N2 Subtype (immunology) |
2 | Influenza A Virus, H3N2 Subtype (isolation & purification) |
2 | Influenza A Virus, H3N2 Subtype (immunology) |
2 | Influenza A Virus, H3N2 Subtype (chemistry) |
2 | Influenza A Virus, H2N2 Subtype (pathogenicity) |
2 | Influenza A Virus, H2N2 Subtype (growth & development) |
2 | Influenza A Virus, H1N1 Subtype (immunology) |
2 | Influenza A Virus, H1N1 Subtype (genetics) |
2 | Immunity |
2 | Immune response |
2 | Homology |
2 | History, Medieval |
2 | History, 19th Century |
2 | History, 18th Century |
2 | History, 17th Century |
2 | History, 16th Century |
2 | Hemagglutinins, Viral (genetics) |
2 | Hemagglutinins, Viral (chemistry) |
2 | Hemagglutinin |
2 | Healthy Volunteers |
2 | Global Health |
2 | Genetic reassortment |
2 | Genes, Viral |
2 | Genes, Viral (genetics) |
2 | Gene |
2 | Finland |
2 | Europe |
2 | Enzyme Stability |
2 | Ducks |
2 | Double-Blind Method |
2 | Disease Reservoirs |
2 | Disease Models, Animal |
2 | Disaster Planning |
2 | Crystallography, X-Ray |
2 | Cross Reactions (immunology) |
2 | Computational Biology |
2 | Bird Diseases (virology) |
2 | Bird Diseases (transmission) |
2 | Binding Sites |
2 | Avian influenzavirus |
2 | Aves |
2 | Asia |
2 | Asia (epidemiology) |
2 | Antigenic Variation |
2 | Antibody |
2 | Antibodies, Viral (analysis) |
2 | Antibodies, Neutralizing (immunology) |
2 | Antibodies, Monoclonal |
2 | Antibodies, Monoclonal (immunology) |
2 | Algorithms |
1 | validation |
1 | prediction |
1 | neutralization |
1 | migratory ducks |
1 | migratory duck |
1 | mechanism of neutralization |
1 | inhibition of internalization |
1 | inhibition of fusion |
1 | inhibition of attachment |
1 | influenza A virus |
1 | computational epidemiology |
1 | affinity |
1 | Zoonoses (history) |
1 | Zanamivir |
1 | World Health Organization |
1 | Winter |
1 | Viruses (isolation & purification) |
1 | Viruses (classification) |
1 | Virus evolution |
1 | Virus Replication (physiology) |
1 | Virus Replication (genetics) |
1 | Virus Replication (drug effects) |
1 | Virus Diseases (virology) |
1 | Virus Diseases (transmission) |
1 | Virus Diseases (epidemiology) |
1 | Virus Diseases (classification) |
1 | Virus Attachment |
1 | Virulence (genetics) |
1 | Virology |
1 | Viral vaccines |
1 | Viral Structural Proteins (genetics) |
1 | Viral Proteins (physiology) |
1 | Viral Proteins (classification) |
1 | Viral Nonstructural Proteins (genetics) |
1 | Viral Matrix Proteins |
1 | Vietnam |
1 | Vaccines |
1 | Vaccines, Inactivated (pharmacology) |
1 | Vaccines, DNA (immunology) |
1 | Vaccines, Attenuated |
1 | Vaccines, Attenuated (immunology) |
1 | Vaccination (statistics & numerical data) |
1 | Vaccination (methods) |
1 | Vaccination (adverse effects) |
1 | Up-Regulation |
1 | United States |
1 | United Kingdom (epidemiology) |
1 | Typing |
1 | Tropical Climate |
1 | Treatment Outcome |
1 | Transmission from animal to animal |
1 | Transfection |
1 | Thermal stability |
1 | Temperature |
1 | Tanzania |
1 | Taiwan (epidemiology) |
1 | T-Lymphocytes (immunology) |
1 | Swine Diseases (transmission) |
1 | Swine Diseases (epidemiology) |
1 | Swine (blood) |
1 | Survival |
1 | Strain |
1 | Stochastic Processes |
1 | Species specificity |
1 | Social Problems |
1 | Sialic Acids (pharmacology) |
1 | Sialic Acids (metabolism) |
1 | Sequence alignment |
1 | Sentinel Surveillance |
1 | Sensitivity and Specificity |
1 | Selection, Genetic |
1 | Season |
1 | Seals, Earless |
1 | Seals, Earless (virology) |
1 | Review |
1 | Reverse Transcriptase Polymerase Chain Reaction |
1 | Reverse Genetics |
1 | Retrospective Studies |
1 | Respiratory tract |
1 | Respiratory disease |
1 | Respiratory Tract Infections (virology) |
1 | Respiratory Tract Infections (prevention & control) |
1 | Respiratory Tract Infections (pathology) |
1 | Respiratory Tract Infections (immunology) |
1 | Research |
1 | Reproducibility of Results |
1 | Recombination, Genetic |
1 | Recombinant Fusion Proteins (metabolism) |
1 | Receptors, Virus (physiology) |
1 | Receptors, Virus (genetics) |
1 | Receptors, Cell Surface (metabolism) |
1 | Reassortant Viruses |
1 | Reassortant Viruses (physiology) |
1 | Reassortant Viruses (pathogenicity) |
1 | Reassortant Viruses (isolation & purification) |
1 | Reassortant Viruses (growth & development) |
1 | Reassortant Viruses (enzymology) |
1 | Real-Time Polymerase Chain Reaction (methods) |
1 | RNA Replicase (genetics) |
1 | Pyrans |
1 | Protein Structure, Secondary |
1 | Property structure relationship |
1 | Propagation velocity |
1 | Probability |
1 | Primary structure |
1 | Pregnancy |
1 | Pregnancy Complications, Infectious (prevention & control) |
1 | Predictive Value of Tests |
1 | Poultry Diseases (metabolism) |
1 | Poultry Diseases (immunology) |
1 | Poultry Diseases (genetics) |
1 | Poultry Diseases (blood) |
1 | Poultry (growth & development) |
1 | Population Surveillance |
1 | Population Growth |
1 | Polysaccharides (metabolism) |
1 | Polysaccharides (chemistry) |
1 | Polysaccharides (analysis) |
1 | Pneumonia, Viral (prevention & control) |
1 | Pneumonia (prevention & control) |
1 | Phenotype |
1 | Perspective |
1 | Pepitope |
1 | Pathogenesis |
1 | Parvovirus, Canine (physiology) |
1 | Parvovirus, Canine (pathogenicity) |
1 | Parvovirus, Canine (genetics) |
1 | Parvovirus, Canine (chemistry) |
1 | Pandemics (history) |
1 | Orthomyxoviridae Infections (transmission) |
1 | Orthomyxoviridae Infections (mortality) |
1 | Orthomyxoviridae Infections (history) |
1 | Orthomyxoviridae Infections (genetics) |
1 | Orthomyxoviridae Infections (epidemiology) |
1 | Orthomyxoviridae Infections (blood) |
1 | Orthomyxoviridae (pathogenicity) |
1 | Orthomyxoviridae (immunology) |
1 | Oregon |
1 | Nucleotide sequence |
1 | Nucleoproteins (classification) |
1 | Nose (virology) |
1 | Nose (immunology) |
1 | Nose (drug effects) |
1 | North America |
1 | North America (epidemiology) |
1 | New Zealand |
1 | New York |
1 | New York (epidemiology) |
1 | Neutrophil Infiltration |
1 | Neutralization Tests (veterinary) |
1 | Netherlands |
1 | N-Acetylneuraminic Acid (metabolism) |
1 | Myocardial Ischemia (mortality) |
1 | Mutation (genetics) |
1 | Mutant Proteins (genetics) |
1 | Mouse |
1 | Morbidity (trends) |
1 | Monoclonal antibody |
1 | Molecular Conformation |
1 | Models, Theoretical |
1 | Modeling |
1 | Mixed infection |
1 | Mink |
1 | Microbiological investigation |
1 | Microarray Analysis |
1 | Mice, Inbred CBA |
1 | Mice, Inbred C57BL |
1 | Method |
1 | Mass Vaccination (organization & administration) |
1 | Madin Darby Canine Kidney Cells |
1 | Lymphocytes (immunology) |
1 | Lymphocyte Activation |
1 | Lung (virology) |
1 | Lung (pathology) |
1 | Lung (drug effects) |
1 | Ligands |
1 | Killer Cells, Natural (immunology) |
1 | Japan |
1 | Italy (epidemiology) |
1 | Israel |
1 | Intestines (virology) |
1 | Interspecies transmission |
1 | Insecta |
1 | Influenzavirus A(H1N1) |
1 | Influenza, Human (pathology) |
1 | Influenza, Human (diagnosis) |
1 | Influenza, Human (blood) |
1 | Influenza viruses |
1 | Influenza virus |
1 | Influenza in Birds (pathology) |
1 | Influenza in Birds (metabolism) |
1 | Influenza in Birds (immunology) |
1 | Influenza in Birds (blood) |
1 | Influenza Vaccines |
1 | Influenza Vaccines (pharmacology) |
1 | Influenza Vaccines (genetics) |
1 | Influenza Vaccines (biosynthesis) |
1 | Influenza B virus (immunology) |
1 | Influenza A viruses |
1 | Influenza A virus (metabolism) |
1 | Influenza A virus (drug effects) |
1 | Influenza A virus (chemistry) |
1 | Influenza A Virus, H9N2 Subtype |
1 | Influenza A Virus, H9N2 Subtype (isolation & purification) |
1 | Influenza A Virus, H7N9 Subtype (metabolism) |
1 | Influenza A Virus, H7N9 Subtype (genetics) |
1 | Influenza A Virus, H7N9 Subtype (chemistry) |
1 | Influenza A Virus, H7N7 Subtype (isolation & purification) |
1 | Influenza A Virus, H7N7 Subtype (immunology) |
1 | Influenza A Virus, H5N1 Subtype |
1 | Influenza A Virus, H5N1 Subtype (pathogenicity) |
1 | Influenza A Virus, H5N1 Subtype (metabolism) |
1 | Influenza A Virus, H5N1 Subtype (isolation & purification) |
1 | Influenza A Virus, H5N1 Subtype (genetics) |
1 | Influenza A Virus, H3N2 Subtype (pathogenicity) |
1 | Influenza A Virus, H3N2 Subtype (metabolism) |
1 | Influenza A Virus, H3N2 Subtype (growth & development) |
1 | Influenza A Virus, H2N2 Subtype (metabolism) |
1 | Influenza A Virus, H2N2 Subtype (chemistry) |
1 | Influenza A Virus, H1N2 Subtype (pathogenicity) |
1 | Influenza A Virus, H1N2 Subtype (genetics) |
1 | Influenza A Virus, H1N1 Subtype (pathogenicity) |
1 | Influenza A Virus, H1N1 Subtype (isolation & purification) |
1 | Influenza A Virus, H1N1 Subtype (drug effects) |
1 | Influenza A Virus, H1N1 Subtype (chemistry) |
1 | Increase |
1 | Immunological method |
1 | Immunodiffusion |
1 | Immunization |
1 | Immunity, Maternally-Acquired |
1 | Immunity, Innate |
1 | IgG |
1 | Iceland |
1 | Iceland (epidemiology) |
1 | Humoral immunity |
1 | Host specificity |
1 | Host range |
1 | Host Specificity |
1 | Host Specificity (genetics) |
1 | Hospitalization (trends) |
1 | Horses |
1 | Horses (virology) |
1 | Horses (blood) |
1 | Horse Diseases (virology) |
1 | Horse Diseases (transmission) |
1 | Horse Diseases (epidemiology) |
1 | History, Ancient |
1 | History, 15th Century |
1 | Hemagglutinin Glycoproteins, Influenza Virus |
1 | Hemagglutinin Glycoproteins, Influenza Virus (history) |
1 | Hemagglutination |
1 | Hemagglutination inhibition test |
1 | Health Services Research |
1 | Health Maintenance Organizations |
1 | Health Care Rationing (methods) |
1 | HEK293 Cells |
1 | HA and NA |
1 | H9N2 |
1 | H3N2 |
1 | H2 subtype |
1 | H1N1 influenza pandemic |
1 | Guinea Pigs |
1 | Guanidines |
1 | Glycoproteins (chemistry) |
1 | Geography |
1 | Genetic variability |
1 | Genetic Variation |
1 | Genetic Complementation Test |
1 | Gene Expression |
1 | Fusion activity |
1 | Follow up study |
1 | Fab |
1 | F(ab′)2 |
1 | Europe (epidemiology) |
1 | Estimation |
1 | Epitopes |
1 | Epitopes, T-Lymphocyte (immunology) |
1 | Epitopes, T-Lymphocyte (chemistry) |
1 | Epidemiologic Methods |
1 | Enzyme Inhibitors (pharmacology) |
1 | Environmental epidemiology |
1 | Environmental Monitoring |
1 | England |