131 | Belgium |
110 | Humans |
77 | Influenza, Human |
67 | Male |
66 | Female |
48 | Adult |
47 | Middle Aged |
46 | Aged |
35 | Influenza Vaccines |
28 | Animals |
27 | Disease Outbreaks |
25 | Adolescent |
24 | Young Adult |
23 | Aged, 80 and over |
22 | Vaccination |
22 | Influenza A virus |
21 | Child |
20 | Child, Preschool |
18 | Influenza A Virus, H1N1 Subtype |
16 | Infant |
14 | Surveys and Questionnaires |
14 | Seasons |
14 | Influenza in Birds |
13 | Antibodies, Viral |
11 | Risk Factors |
11 | Retrospective Studies |
11 | Netherlands |
11 | Cross-Sectional Studies |
10 | Population Surveillance |
10 | Influenza A Virus, H5N1 Subtype |
10 | Incidence |
9 | Sensitivity and Specificity |
9 | Prevalence |
9 | Infant, Newborn |
8 | Time Factors |
8 | Antiviral Agents |
7 | Swine |
7 | Sentinel Surveillance |
7 | Respiratory Tract Infections |
7 | Prospective Studies |
7 | Influenza B virus |
6 | Seroepidemiologic Studies |
6 | Risk Assessment |
6 | Pregnancy |
6 | Poultry |
6 | Patient Acceptance of Health Care |
6 | Pandemics |
6 | Orthomyxoviridae |
6 | Orthomyxoviridae Infections |
6 | Logistic Models |
6 | Germany |
6 | France |
6 | Age Factors |
5 | Virus Diseases |
5 | Swine Diseases |
5 | Socioeconomic Factors |
5 | Pneumococcal Vaccines |
5 | Oseltamivir |
5 | Hemagglutination Inhibition Tests |
5 | Health Personnel |
5 | Health Knowledge, Attitudes, Practice |
5 | Family Practice |
5 | Europe |
5 | Enzyme-Linked Immunosorbent Assay |
5 | Cohort Studies |
5 | Attitude of Health Personnel |
4 | Travel |
4 | Regression Analysis |
4 | Primary Health Care |
4 | Pregnancy Complications, Infectious |
4 | Phylogeny |
4 | Nursing Homes |
4 | Nasopharynx |
4 | Multivariate Analysis |
4 | Intensive Care Units |
4 | Influenza A Virus, H3N2 Subtype |
4 | Infection Control |
4 | Immunization Programs |
4 | Hospitalization |
4 | Epidemiological Monitoring |
4 | Disaster Planning |
4 | Diagnosis, Differential |
4 | Denmark |
4 | Data Collection |
4 | Communicable Disease Control |
4 | Birds |
4 | Anti-Bacterial Agents |
4 | Age Distribution |
3 | Vaccines, Inactivated |
3 | United Kingdom |
3 | Tetanus Toxoid |
3 | Switzerland |
3 | Statistics, Nonparametric |
3 | Smoking |
3 | Serotyping |
3 | Reverse Transcriptase Polymerase Chain Reaction |
3 | Respiratory Tract Diseases |
3 | Respiratory Syncytial Viruses |
3 | Real-Time Polymerase Chain Reaction |
3 | Reagent Kits, Diagnostic |
3 | Public Health |
3 | Preventive Health Services |
3 | Practice Patterns, Physicians' |
3 | Portugal |
3 | Polymerase Chain Reaction |
3 | Pneumonia, Viral |
3 | Odds Ratio |
3 | Models, Theoretical |
3 | Models, Statistical |
3 | Internet |
3 | Immunization |
3 | Immunization Schedule |
3 | Hospitals |
3 | Health Surveys |
3 | Guideline Adherence |
3 | Genetic Variation |
3 | General Practitioners |
3 | Epidemics |
3 | England |
3 | Educational Status |
3 | Drug-Related Side Effects and Adverse Reactions |
3 | Croatia |
3 | Common Cold |
3 | Chi-Square Distribution |
3 | Canada |
3 | Austria |
3 | Antibodies, Bacterial |
3 | Animal Husbandry |
2 | alpha-Tocopherol |
2 | Zoonoses |
2 | Whooping Cough |
2 | Virulence |
2 | Virology |
2 | Vaccines, Conjugate |
2 | Vaccines, Attenuated |
2 | Vaccination Coverage |
2 | Treatment Outcome |
2 | Survival Analysis |
2 | Students, Medical |
2 | Streptococcus pneumoniae |
2 | Squalene |
2 | Spain |
2 | Social Behavior |
2 | Smoking Prevention |
2 | Risk |
2 | Renal Dialysis |
2 | Registries |
2 | Random Allocation |
2 | RNA, Viral |
2 | Quality of Health Care |
2 | Pseudorabies |
2 | Probability |
2 | Pregnant Women |
2 | Predictive Value of Tests |
2 | Practice Guidelines as Topic |
2 | Poultry Diseases |
2 | Population Control |
2 | Polysorbates |
2 | Pneumonia, Pneumococcal |
2 | Pilot Projects |
2 | Physicians, Family |
2 | Pharmacies |
2 | Pertussis Vaccine |
2 | Patient Admission |
2 | Neuraminidase |
2 | National Health Programs |
2 | Nasal Mucosa |
2 | Myocardial Infarction |
2 | Mortality |
2 | Molecular Sequence Data |
2 | Molecular Epidemiology |
2 | Molecular Diagnostic Techniques |
2 | Models, Economic |
2 | Military Personnel |
2 | Military Medicine |
2 | Livestock |
2 | Laboratories |
2 | Japan |
2 | Italy |
2 | Invasive Pulmonary Aspergillosis |
2 | Interviews as Topic |
2 | Injections, Intradermal |
2 | Influenza A Virus, H7N7 Subtype |
2 | Hospitals, University |
2 | Hospital Mortality |
2 | Hemagglutination Tests |
2 | Health Services Needs and Demand |
2 | Health Education |
2 | Haemophilus Vaccines |
2 | Genome, Viral |
2 | Gastrointestinal Diseases |
2 | Forecasting |
2 | Follow-Up Studies |
2 | Extracorporeal Membrane Oxygenation |
2 | Evaluation Studies as Topic |
2 | Environmental Monitoring |
2 | Emergency Service, Hospital |
2 | Ducks |
2 | Drug Combinations |
2 | Disease Notification |
2 | Diphtheria-Tetanus-Pertussis Vaccine |
2 | Diabetes Mellitus |
2 | Decision Making |
2 | Czech Republic |
2 | Cross Infection |
2 | Critical Care |
2 | Cost-Benefit Analysis |
2 | Community-Acquired Infections |
2 | Communicable Diseases |
2 | Clinical Competence |
2 | Case-Control Studies |
2 | Bird Diseases |
2 | Biomarkers |
2 | Antigens, Viral |
2 | Antibodies, Neutralizing |
2 | Anseriformes |
2 | Animals, Wild |
1 | Zanamivir |
1 | Yersinia enterocolitica |
1 | World War I |
1 | World Health Organization |
1 | Workplace |
1 | Wales |
1 | Viruses |
1 | Viral Vaccines |
1 | Viral Load |
1 | Ventricular Dysfunction, Right |
1 | Ventricular Dysfunction, Left |
1 | Vaginal Smears |
1 | Vaccines, Combined |
1 | Uterine Cervical Neoplasms |
1 | Uncertainty |
1 | Turkeys |
1 | Turkey |
1 | Transmissible gastroenteritis virus |
1 | Touch |
1 | Tobacco Smoke Pollution |
1 | Thailand |
1 | Text Messaging |
1 | Tertiary Care Centers |
1 | Temperature |
1 | Syringes |
1 | Sweden |
1 | Survival Rate |
1 | Superinfection |
1 | Statistics as Topic |
1 | Staphylococcus aureus |
1 | Specimen Handling |
1 | Space-Time Clustering |
1 | Social Networking |
1 | Smoking Cessation |
1 | Smoke-Free Policy |
1 | Slovenia |
1 | Slovakia |
1 | Single-Blind Method |
1 | Sex Factors |
1 | Severe Acute Respiratory Syndrome |
1 | Serologic Tests |
1 | Sequence Analysis |
1 | Sequence Analysis, RNA |
1 | Sequence Analysis, DNA |
1 | Self Report |
1 | Scotland |
1 | Schools |
1 | Safety |
1 | Safety Management |
1 | SARS Virus |
1 | Rural Population |
1 | Rotavirus |
1 | Romania |
1 | Risk Management |
1 | Restaurants |
1 | Respirovirus |
1 | Respirovirus Infections |
1 | Respiratory Syncytial Virus, Human |
1 | Respiratory Syncytial Virus Infections |
1 | Respiratory Distress Syndrome, Adult |
1 | Reproducibility of Results |
1 | Reminder Systems |
1 | Raptors |
1 | ROC Curve |
1 | RNA, Ribosomal, 16S |
1 | Quality-Adjusted Life Years |
1 | Quality of Life |
1 | Qualitative Research |
1 | Pulmonary Disease, Chronic Obstructive |
1 | Public Health Surveillance |
1 | Public Health Practice |
1 | Public Health Informatics |
1 | Protein Conformation |
1 | Program Evaluation |
1 | Prognosis |
1 | Product Surveillance, Postmarketing |
1 | Probiotics |
1 | Premature Birth |
1 | Pregnancy Trimesters |
1 | Pregnancy Trimester, Third |
1 | Pre-Exposure Prophylaxis |
1 | Postpartum Period |
1 | Poland |
1 | Poisson Distribution |
1 | Point-of-Care Systems |
1 | Pneumonia |
1 | Pneumonia, Bacterial |
1 | Pneumonia of Swine, Mycoplasmal |
1 | Placebos |
1 | Phylogeography |
1 | Photography |
1 | Pharynx |
1 | Pharmaceutical Preparations |
1 | Pets |
1 | Personnel, Hospital |
1 | Percutaneous Coronary Intervention |
1 | Perception |
1 | Patient-Centered Care |
1 | Patient Satisfaction |
1 | Patient Safety |
1 | Patient Preference |
1 | Parvoviridae Infections |
1 | Paris |
1 | Papanicolaou Test |
1 | Ownership |
1 | Opportunistic Infections |
1 | Online Systems |
1 | Nucleic Acid Amplification Techniques |
1 | Norway |
1 | Northern Ireland |
1 | Nonlinear Dynamics |
1 | Nocardia |
1 | Nocardia Infections |
1 | Newspapers as Topic |
1 | Neutralization Tests |
1 | Nervous System Diseases |
1 | Mycoplasma |
1 | Mycoplasma Infections |
1 | Morbidity |
1 | Moraxella catarrhalis |
1 | Mongolia |
1 | Models, Molecular |
1 | Models, Genetic |
1 | Models, Econometric |
1 | Models, Biological |
1 | Milk |
1 | Military Nursing |
1 | Microbial Sensitivity Tests |
1 | Mice |
1 | Mice, Inbred BALB C |
1 | Metered Dose Inhalers |
1 | Metapneumovirus |
1 | Memory |
1 | Medication Errors |
1 | Medication Adherence |
1 | Mass Vaccination |
1 | Mass Screening |
1 | Mass Media |
1 | Mammography |
1 | Malaria |
1 | Malaria, Falciparum |
1 | Lung |
1 | Lung Transplantation |
1 | Longitudinal Studies |
1 | London |
1 | Linear Models |
1 | Lactobacillus casei |
1 | Kidney Transplantation |
1 | Kidney Failure, Chronic |
1 | Ireland |
1 | Interpersonal Relations |
1 | Internationality |
1 | International Cooperation |
1 | International Agencies |
1 | Interinstitutional Relations |
1 | Interdisciplinary Communication |
1 | Intention |
1 | Insurance Claim Review |
1 | Influenza A Virus, H5N2 Subtype |
1 | Influenza A Virus, H3N8 Subtype |
1 | Infectious Disease Transmission, Professional-to-Patient |
1 | Infant, Premature |
1 | Indonesia |
1 | Inappropriate Prescribing |
1 | Immunosuppressive Agents |
1 | Immunoassay |
1 | Immunization, Secondary |
1 | Immunity, Humoral |
1 | Immunity, Cellular |
1 | Hypercholesterolemia |
1 | Hungary |
1 | Human bocavirus |
1 | Hospitals, Military |
1 | Hospitals, Convalescent |
1 | Hospital Costs |
1 | Horses |
1 | Horse Diseases |
1 | Holidays |
1 | History, 21st Century |
1 | History, 20th Century |
1 | History of Medicine |
1 | Histocompatibility Antigens Class II |
1 | Histocompatibility Antigens Class I |
1 | High-Throughput Nucleotide Sequencing |
1 | Herpesvirus 1, Suid |
1 | Hemodynamics |
1 | Hemagglutinins |
1 | Healthy Volunteers |
1 | Health Services for the Aged |
1 | Health Services Research |
1 | Health Services Accessibility |
1 | Health Priorities |
1 | Health Policy |
1 | Hand Hygiene |
1 | Haemophilus influenzae |
1 | Guidelines as Topic |
1 | Glucocorticoids |
1 | Global Health |
1 | Geriatric Assessment |
1 | Genotype |
1 | Fever |
1 | Fermentation |
1 | Feasibility Studies |
1 | Family Characteristics |
1 | Epitopes |
1 | Environmental Exposure |
1 | Electronic Mail |
1 | Electronic Health Records |
1 | Electrocardiography |
1 | Educational Measurement |
1 | Education, Medical, Undergraduate |
1 | Ecosystem |
1 | Economics |
1 | Echocardiography |
1 | Early Detection of Cancer |
1 | Drug Resistance, Bacterial |
1 | Double-Blind Method |
1 | Disease Susceptibility |
1 | Disaster Medicine |
1 | Diagnostic Tests, Routine |
1 | Diabetes Complications |
1 | Decision Support Techniques |
1 | Databases, Factual |
1 | DNA, Viral |
1 | Curriculum |
1 | Cross-Cultural Comparison |
1 | Cross Reactions |
1 | Critical Illness |
1 | Crime |
1 | Cost of Illness |
1 | Correspondence as Topic |
1 | Cooperative Behavior |
1 | Contact Tracing |
1 | Computer Communication Networks |
1 | Computational Biology |
1 | Comorbidity |
1 | Community Pharmacy Services |
1 | Cognition |
1 | Cluster Analysis |
1 | Cloning, Molecular |
1 | Clinical Laboratory Techniques |
1 | Climate |
1 | Classical Swine Fever |
1 | Chronic Disease |
1 | Chromatography, Affinity |
1 | China |
1 | Chile |
1 | Child, Hospitalized |
1 | Chikungunya virus |
1 | Chemoprevention |
1 | Charadriiformes |
1 | Carrier State |
1 | Cardiac Output |
1 | Campylobacter |
1 | CD4-Positive T-Lymphocytes |
1 | Bronchoalveolar Lavage Fluid |
1 | Breast Neoplasms |
1 | Blood Chemical Analysis |
1 | Berlin |
1 | Bayes Theorem |
1 | Base Sequence |
1 | Bacterial Vaccines |
1 | Bacterial Typing Techniques |
1 | Bacterial Infections |
1 | Avulavirus |
1 | Avulavirus Infections |
1 | Aviation |
1 | Audiovisual Aids |
1 | Attitude to Health |
1 | Aspergillus |
1 | Area Under Curve |
1 | Antimalarials |
1 | Antibodies |
1 | Antibiotic Prophylaxis |
1 | Anniversaries and Special Events |
1 | Animals, Domestic |
1 | Animal Migration |
1 | Analysis of Variance |
1 | Ambulatory Care |
1 | Ambulances |
1 | Alphavirus Infections |
1 | Aleutian Mink Disease Virus |
1 | Air Pollution |