| 678 | Humans |
| 400 | Animals |
| 315 | Male |
| 307 | Female |
| 226 | Influenza, Human |
| 196 | Mice |
| 190 | Adult |
| 159 | Stress, Psychological |
| 147 | Influenza A virus |
| 135 | Orthomyxoviridae Infections |
| 130 | Middle Aged |
| 113 | Oxidative Stress |
| 108 | Disease Outbreaks |
| 100 | Influenza Vaccines |
| 99 | Severe Acute Respiratory Syndrome |
| 99 | Influenza A Virus, H1N1 Subtype |
| 83 | Stress, Physiological |
| 83 | Aged |
| 82 | Adolescent |
| 79 | Lung |
| 74 | Mice, Inbred C57BL |
| 63 | Cell Line |
| 62 | Surveys and Questionnaires |
| 56 | Pneumonia, Viral |
| 55 | Antioxidants |
| 54 | Pandemics |
| 52 | Risk Factors |
| 51 | Virus Replication |
| 49 | Young Adult |
| 48 | Signal Transduction |
| 46 | Apoptosis |
| 45 | Time Factors |
| 45 | Cytokines |
| 45 | Antiviral Agents |
| 44 | Coronavirus Infections |
| 44 | Child |
| 41 | Vaccination |
| 41 | Host-Pathogen Interactions |
| 41 | Cells, Cultured |
| 40 | Stress Disorders, Post-Traumatic |
| 40 | Reactive Oxygen Species |
| 39 | Orthomyxoviridae |
| 39 | Mice, Inbred BALB C |
| 39 | Dogs |
| 38 | Antibodies, Viral |
| 36 | Aged, 80 and over |
| 34 | RNA, Messenger |
| 34 | Inflammation |
| 34 | Gene Expression Regulation |
| 34 | Disease Models, Animal |
| 34 | China |
| 34 | Betacoronavirus |
| 33 | Virus Diseases |
| 33 | Health Personnel |
| 31 | Influenza A Virus, H5N1 Subtype |
| 30 | Cross-Sectional Studies |
| 27 | Madin Darby Canine Kidney Cells |
| 27 | Influenza in Birds |
| 27 | Immunity, Innate |
| 27 | Hong Kong |
| 27 | Adaptation, Psychological |
| 25 | Pregnancy |
| 24 | Viral Proteins |
| 24 | Prevalence |
| 24 | Oxidation-Reduction |
| 24 | Hemagglutinin Glycoproteins, Influenza Virus |
| 24 | Biomarkers |
| 23 | SARS Virus |
| 23 | Cell Line, Tumor |
| 22 | Depression |
| 22 | Child, Preschool |
| 21 | Phosphorylation |
| 21 | Chickens |
| 20 | T-Lymphocytes |
| 20 | Restraint, Physical |
| 20 | Pneumonia |
| 20 | Models, Biological |
| 20 | Gene Expression Profiling |
| 20 | Epithelial Cells |
| 19 | Treatment Outcome |
| 19 | Severity of Illness Index |
| 19 | Interleukin-6 |
| 19 | Interferon-gamma |
| 19 | Hot Temperature |
| 19 | Heat-Shock Proteins |
| 19 | Brain |
| 19 | Anxiety |
| 19 | Aging |
| 19 | Age Factors |
| 18 | United States |
| 18 | Temperature |
| 18 | Social Support |
| 18 | Seasons |
| 18 | Molecular Sequence Data |
| 18 | Mental Disorders |
| 18 | Lipid Peroxidation |
| 18 | Health Knowledge, Attitudes, Practice |
| 18 | Disaster Planning |
| 18 | Chlorocebus aethiops |
| 18 | Caregivers |
| 18 | Antibody Formation |
| 17 | Respiratory Tract Infections |
| 17 | Protein Binding |
| 17 | Influenza A Virus, H3N2 Subtype |
| 17 | Endoplasmic Reticulum |
| 17 | Disease Susceptibility |
| 16 | Reverse Transcriptase Polymerase Chain Reaction |
| 16 | Retrospective Studies |
| 16 | Quarantine |
| 16 | Prospective Studies |
| 16 | Mice, Knockout |
| 16 | Mental Health |
| 16 | Macrophages |
| 16 | Endoplasmic Reticulum Stress |
| 16 | Blotting, Western |
| 15 | Viral Nonstructural Proteins |
| 15 | Superoxide Dismutase |
| 15 | Life Change Events |
| 15 | HeLa Cells |
| 15 | HEK293 Cells |
| 15 | Gene Expression |
| 15 | Follow-Up Studies |
| 15 | Fear |
| 15 | Cold Temperature |
| 15 | Birds |
| 15 | Analysis of Variance |
| 14 | eIF-2 Kinase |
| 14 | Viral Load |
| 14 | Socioeconomic Factors |
| 14 | Personnel, Hospital |
| 14 | Nursing Staff, Hospital |
| 14 | Medical Staff, Hospital |
| 14 | Killer Cells, Natural |
| 14 | Infection Control |
| 14 | Cohort Studies |
| 14 | Chronic Disease |
| 14 | CD8-Positive T-Lymphocytes |
| 14 | Autophagy |
| 13 | Transcriptome |
| 13 | Taiwan |
| 13 | Smoking |
| 13 | Respiratory Distress Syndrome, Adult |
| 13 | RNA-Binding Proteins |
| 13 | RNA, Viral |
| 13 | Occupational Diseases |
| 13 | Nitric Oxide |
| 13 | Mutation |
| 13 | Mice, Inbred ICR |
| 13 | Liver |
| 13 | Influenza B virus |
| 13 | Infant |
| 13 | Incidence |
| 13 | Health Status |
| 13 | Health Behavior |
| 13 | Enzyme Activation |
| 13 | Corticosterone |
| 13 | Cell Survival |
| 13 | Attitude of Health Personnel |
| 13 | Antigens, Viral |
| 13 | A549 Cells |
| 12 | Viral Envelope Proteins |
| 12 | Vero Cells |
| 12 | Tumor Necrosis Factor-alpha |
| 12 | Transcription Factors |
| 12 | Swine |
| 12 | Survival Analysis |
| 12 | Recombinant Proteins |
| 12 | Population Surveillance |
| 12 | NF-kappa B |
| 12 | Microwaves |
| 12 | Membrane Proteins |
| 12 | Interferons |
| 12 | Hydrocortisone |
| 12 | Health Surveys |
| 12 | Communicable Diseases |
| 12 | Amino Acid Sequence |
| 12 | Acute Disease |
| 11 | Virulence |
| 11 | Up-Regulation |
| 11 | Sex Factors |
| 11 | Schizophrenia |
| 11 | Risk Assessment |
| 11 | Public Health |
| 11 | Proteome |
| 11 | Prenatal Exposure Delayed Effects |
| 11 | Ontario |
| 11 | Lymphocyte Activation |
| 11 | Interleukin-2 |
| 11 | Immunologic Memory |
| 11 | Immunoglobulin G |
| 11 | HSP70 Heat-Shock Proteins |
| 11 | Global Health |
| 11 | Down-Regulation |
| 11 | Data Collection |
| 11 | Communicable Disease Control |
| 11 | Common Cold |
| 11 | Canada |
| 10 | Workforce |
| 10 | Superoxides |
| 10 | Students |
| 10 | Species Specificity |
| 10 | Rats |
| 10 | Protein Transport |
| 10 | Plant Extracts |
| 10 | Oligonucleotide Array Sequence Analysis |
| 10 | Nurses |
| 10 | Neoplasms |
| 10 | Multivariate Analysis |
| 10 | Mitochondria |
| 10 | Interferon-beta |
| 10 | Infectious Disease Transmission, Patient-to-Professional |
| 10 | Immune Tolerance |
| 10 | Hydrogen-Ion Concentration |
| 10 | Glucocorticoids |
| 10 | Fibroblasts |
| 10 | Exercise |
| 10 | Enzyme-Linked Immunosorbent Assay |
| 10 | Cell Phone |
| 10 | Cardiovascular Diseases |
| 10 | Base Sequence |
| 10 | Adjuvants, Immunologic |
| 10 | Acute Lung Injury |
| 9 | Toll-Like Receptor 4 |
| 9 | Singapore |
| 9 | Saliva |
| 9 | Regression Analysis |
| 9 | Proteomics |
| 9 | Pregnancy Complications, Infectious |
| 9 | Phenotype |
| 9 | Occupational Exposure |
| 9 | Morbidity |
| 9 | Mitogen-Activated Protein Kinases |
| 9 | Membrane Glycoproteins |
| 9 | Leukocytes, Mononuclear |
| 9 | Kidney |
| 9 | Interferon Type I |
| 9 | Intensive Care Units |
| 9 | Inflammation Mediators |
| 9 | Hospitalization |
| 9 | Glutathione |
| 9 | Europe |
| 9 | Environmental Exposure |
| 9 | Emotions |
| 9 | Dietary Supplements |
| 9 | Cell Nucleus |
| 9 | Body Weight |
| 9 | B-Lymphocytes |
| 9 | Attitude to Health |
| 9 | Anxiety Disorders |
| 9 | Anti-Bacterial Agents |
| 8 | p38 Mitogen-Activated Protein Kinases |
| 8 | Viral Vaccines |
| 8 | Viral Matrix Proteins |
| 8 | Vaccines, Inactivated |
| 8 | Transcription, Genetic |
| 8 | Structure-Activity Relationship |
| 8 | Staphylococcus aureus |
| 8 | Real-Time Polymerase Chain Reaction |
| 8 | Radio Waves |
| 8 | Quality of Life |
| 8 | Psychoneuroimmunology |
| 8 | Protein Biosynthesis |
| 8 | Poultry Diseases |
| 8 | Phylogeny |
| 8 | Neutrophils |
| 8 | Mice, Transgenic |
| 8 | Lipopolysaccharides |
| 8 | Japan |
| 8 | JNK Mitogen-Activated Protein Kinases |
| 8 | Interviews as Topic |
| 8 | Influenza A Virus, H9N2 Subtype |
| 8 | Immunohistochemistry |
| 8 | Immunity |
| 8 | Immobilization |
| 8 | Hydrogen Peroxide |
| 8 | Horses |
| 8 | HIV Infections |
| 8 | Germany |
| 8 | Drugs, Chinese Herbal |
| 8 | Disease Transmission, Infectious |
| 8 | Diet |
| 8 | Depressive Disorder |
| 8 | Critical Care |
| 8 | Cricetinae |
| 8 | Coronavirus |
| 8 | Cause of Death |
| 8 | Catalase |
| 8 | Caspase 3 |
| 8 | Case-Control Studies |
| 8 | CD4-Positive T-Lymphocytes |
| 8 | Bronchoalveolar Lavage Fluid |
| 8 | Bacterial Proteins |
| 7 | Viral Core Proteins |
| 7 | Unfolded Protein Response |
| 7 | Takotsubo Cardiomyopathy |
| 7 | Survivors |
| 7 | Risk |
| 7 | Respiratory Tract Diseases |
| 7 | Pulmonary Disease, Chronic Obstructive |
| 7 | Prognosis |
| 7 | Practice Guidelines as Topic |
| 7 | NADPH Oxidases |
| 7 | Mortality |
| 7 | Microscopy, Electron, Transmission |
| 7 | Mice, Inbred CBA |
| 7 | Malondialdehyde |
| 7 | Lymphocytes |
| 7 | Lymph Nodes |
| 7 | Interleukin-1beta |
| 7 | Immunity, Cellular |
| 7 | Immune System |
| 7 | Heat-Shock Response |
| 7 | Heat Stress Disorders |
| 7 | Gene Knockdown Techniques |
| 7 | Flavonoids |
| 7 | Drug Stability |
| 7 | Dose-Response Relationship, Drug |
| 7 | DNA-Binding Proteins |
| 7 | DEAD Box Protein 58 |
| 7 | Cytoplasmic Granules |
| 7 | Cross Infection |
| 7 | Critical Illness |
| 7 | Comorbidity |
| 7 | Cattle |
| 7 | Caspases |
| 7 | Antibodies, Monoclonal |
| 7 | Anti-Inflammatory Agents |
| 7 | Animals, Newborn |
| 6 | Vitamin E |
| 6 | Viruses |
| 6 | T-Lymphocyte Subsets |
| 6 | Swine Diseases |
| 6 | Survival Rate |
| 6 | Spleen |
| 6 | Spectrometry, Fluorescence |
| 6 | Social Isolation |
| 6 | Selenium |
| 6 | Respiratory Mucosa |
| 6 | Respiration, Artificial |
| 6 | Reference Values |
| 6 | RNA, Small Interfering |
| 6 | Psychiatric Status Rating Scales |
| 6 | Proteins |
| 6 | Protein-Serine-Threonine Kinases |
| 6 | Protein Conformation |
| 6 | Polymerase Chain Reaction |
| 6 | Plasmids |
| 6 | Pituitary-Adrenal System |
| 6 | Personality Inventory |
| 6 | Peptide Fragments |
| 6 | Patient Acceptance of Health Care |
| 6 | Paramyxoviridae Infections |
| 6 | Oseltamivir |
| 6 | Occupational Health |
| 6 | Newcastle disease virus |
| 6 | Neurons |
| 6 | NF-E2-Related Factor 2 |
| 6 | Models, Molecular |
| 6 | Military Personnel |
| 6 | Mifepristone |
| 6 | Mental Health Services |
| 6 | Longitudinal Studies |
| 6 | Logistic Models |
| 6 | Kinetics |
| 6 | Italy |
| 6 | Interleukin-10 |
| 6 | Infant, Newborn |
| 6 | Immunocompetence |
| 6 | Immunization Programs |
| 6 | Horse Diseases |
| 6 | Homeostasis |
| 6 | Hemagglutinins, Viral |
| 6 | Gene Expression Regulation, Viral |
| 6 | Free Radicals |
| 6 | France |
| 6 | Flow Cytometry |
| 6 | Enzyme Inhibitors |
| 6 | Emergency Service, Hospital |
| 6 | Drug Evaluation, Preclinical |
| 6 | Disasters |
| 6 | Dendritic Cells |
| 6 | DNA Damage |
| 6 | DEAD-box RNA Helicases |
| 6 | Czech Republic |
| 6 | Chick Embryo |
| 6 | Carrier Proteins |
| 6 | Body Temperature |
| 6 | Binding Sites |
| 6 | Behavior, Animal |
| 6 | Bacterial Infections |
| 6 | Asthma |
| 6 | Adaptive Immunity |
| 6 | Acetylcysteine |
| 5 | Wounds and Injuries |
| 5 | Workplace |
| 5 | Weight Loss |
| 5 | Vaccines |
| 5 | Urban Population |
| 5 | Thioredoxins |
| 5 | Th2 Cells |
| 5 | Superoxide Dismutase-1 |
| 5 | Staphylococcal Infections |
| 5 | Spike Glycoprotein, Coronavirus |
| 5 | Sleep |
| 5 | Sex Characteristics |
| 5 | Ribonucleoproteins |
| 5 | Rats, Sprague-Dawley |
| 5 | Radiation Dosage |
| 5 | RNA |
| 5 | Quercetin |
| 5 | Qualitative Research |
| 5 | Pulmonary Alveoli |
| 5 | Psychophysiologic Disorders |
| 5 | Psychometrics |
| 5 | Pregnancy Complications |
| 5 | Poultry |
| 5 | Phytotherapy |
| 5 | Physical Exertion |
| 5 | Patient Isolation |
| 5 | Parents |
| 5 | Nutritional Status |
| 5 | Nucleoproteins |
| 5 | Nitric Oxide Synthase Type II |
| 5 | Neurosecretory Systems |
| 5 | Neuraminidase |
| 5 | Netherlands |
| 5 | Monocytes |
| 5 | Molecular Structure |
| 5 | Molecular Chaperones |
| 5 | Models, Theoretical |
| 5 | Mice, Inbred DBA |
| 5 | Membrane Potential, Mitochondrial |
| 5 | Mass Screening |
| 5 | Mass Media |
| 5 | Longevity |
| 5 | Light |
| 5 | Internet |
| 5 | Immunization |
| 5 | Hypothalamo-Hypophyseal System |
| 5 | Heme Oxygenase-1 |
| 5 | Hemagglutination Tests |
| 5 | Glucose |
| 5 | Genetic Vectors |
| 5 | Genetic Variation |
| 5 | Gene Expression Regulation, Bacterial |
| 5 | Free Radical Scavengers |
| 5 | Evolution, Molecular |
| 5 | Eukaryotic Initiation Factor-2 |
| 5 | Emergency Medical Services |
| 5 | Echocardiography |
| 5 | Disease Progression |
| 5 | Dementia |
| 5 | Delivery of Health Care |
| 5 | Decision Making |
| 5 | DNA |
| 5 | Copper |
| 5 | Computational Biology |
| 5 | Community-Acquired Infections |
| 5 | Communication |
| 5 | Cell Proliferation |
| 5 | Cell Death |
| 5 | Body Mass Index |
| 5 | Australia |
| 5 | Ascorbic Acid |
| 5 | Anti-Inflammatory Agents, Non-Steroidal |
| 5 | Animal Husbandry |
| 5 | Affect |
| 5 | Adrenocorticotropic Hormone |
| 5 | Adrenal Cortex Hormones |
| 5 | Administration, Oral |
| 5 | Absenteeism |
| 4 | Zoonoses |
| 4 | Xanthine Oxidase |
| 4 | Virus Release |
| 4 | Universities |
| 4 | Tyrosine |
| 4 | Travel |
| 4 | Trans-Activators |
| 4 | Tobacco |
| 4 | Thiobarbituric Acid Reactive Substances |
| 4 | Th1 Cells |
| 4 | T-Lymphocytes, Helper-Inducer |
| 4 | T-Lymphocytes, Cytotoxic |
| 4 | Spouses |
| 4 | Social Environment |
| 4 | Sleep Initiation and Maintenance Disorders |
| 4 | Skin |
| 4 | Sequence Analysis, DNA |
| 4 | Rural Population |
| 4 | Respiratory System |
| 4 | Respiratory Syncytial Virus Infections |
| 4 | Reproducibility of Results |
| 4 | Repressor Proteins |
| 4 | Rats, Wistar |
| 4 | Rabbits |
| 4 | Public Opinion |
| 4 | Proto-Oncogene Proteins c-akt |
| 4 | Protein Processing, Post-Translational |
| 4 | Protein Folding |
| 4 | Promoter Regions, Genetic |
