582 | Netherlands |
481 | Humans |
344 | Influenza, Human |
228 | Female |
218 | Male |
175 | Influenza Vaccines |
166 | Middle Aged |
163 | Animals |
159 | Adult |
153 | Aged |
147 | Disease Outbreaks |
119 | Influenza A virus |
115 | Influenza in Birds |
103 | Adolescent |
98 | Vaccination |
85 | Child, Preschool |
84 | Child |
81 | Infant |
72 | Influenza A Virus, H1N1 Subtype |
67 | Aged, 80 and over |
60 | Seasons |
59 | Young Adult |
55 | Surveys and Questionnaires |
54 | Poultry |
53 | Incidence |
50 | Risk Factors |
42 | Infant, Newborn |
41 | Population Surveillance |
37 | Birds |
36 | Chickens |
34 | Retrospective Studies |
33 | Antiviral Agents |
32 | Respiratory Tract Infections |
32 | Pandemics |
32 | Influenza A Virus, H7N7 Subtype |
32 | Antibodies, Viral |
31 | Poultry Diseases |
31 | Influenza B virus |
29 | Orthomyxoviridae |
28 | Sentinel Surveillance |
28 | Hospitalization |
27 | Influenza A Virus, H5N1 Subtype |
25 | Age Factors |
23 | Swine |
23 | Prospective Studies |
23 | Oseltamivir |
23 | Orthomyxoviridae Infections |
23 | Immunization Programs |
23 | Hemagglutination Inhibition Tests |
23 | Cross-Sectional Studies |
23 | Cost-Benefit Analysis |
22 | Zoonoses |
22 | Mortality |
22 | Family Practice |
22 | Cohort Studies |
21 | Prevalence |
20 | Time Factors |
20 | Risk Assessment |
19 | Health Knowledge, Attitudes, Practice |
18 | Health Personnel |
16 | Odds Ratio |
16 | Influenza A Virus, H3N2 Subtype |
16 | Epidemics |
16 | Cause of Death |
16 | Animal Husbandry |
15 | Pregnancy |
15 | Internet |
15 | Attitude of Health Personnel |
15 | Animals, Wild |
14 | Virus Diseases |
14 | Public Health |
14 | Practice Guidelines as Topic |
14 | Pneumococcal Vaccines |
14 | Nursing Homes |
14 | Germany |
14 | Communicable Disease Control |
13 | United States |
13 | United Kingdom |
13 | Treatment Outcome |
13 | Sensitivity and Specificity |
13 | Regression Analysis |
13 | Phylogeny |
13 | Models, Biological |
13 | Age Distribution |
12 | Swine Diseases |
12 | Risk |
12 | Respiratory Tract Diseases |
12 | Registries |
12 | Primary Health Care |
12 | Patient Acceptance of Health Care |
12 | Europe |
12 | Disease Transmission, Infectious |
12 | Case-Control Studies |
11 | Turkeys |
11 | Seroepidemiologic Studies |
11 | RNA, Viral |
11 | Practice Patterns, Physicians' |
11 | Pneumonia |
11 | Models, Theoretical |
11 | Models, Statistical |
11 | Logistic Models |
11 | Belgium |
11 | Animal Migration |
10 | Sex Distribution |
10 | Reverse Transcriptase Polymerase Chain Reaction |
10 | Pneumococcal Infections |
10 | Neuraminidase |
10 | Ducks |
10 | Cost of Illness |
10 | Asthma |
9 | Severity of Illness Index |
9 | Sequence Analysis, DNA |
9 | Respiratory Syncytial Virus Infections |
9 | Mass Vaccination |
9 | Longitudinal Studies |
9 | Health Surveys |
9 | Enzyme-Linked Immunosorbent Assay |
9 | Computer Simulation |
9 | Communicable Diseases |
9 | Cardiovascular Diseases |
8 | Real-Time Polymerase Chain Reaction |
8 | National Health Programs |
8 | Models, Economic |
8 | Influenza A Virus, H5N8 Subtype |
8 | Health Policy |
8 | Global Health |
8 | General Practitioners |
8 | Diagnosis, Differential |
8 | Cross Infection |
8 | Biomedical Research |
8 | Antigens, Viral |
8 | Antibodies |
7 | Societies, Medical |
7 | Reproducibility of Results |
7 | Reassortant Viruses |
7 | Qualitative Research |
7 | Publishing |
7 | Polymerase Chain Reaction |
7 | Multivariate Analysis |
7 | Molecular Sequence Data |
7 | Italy |
7 | History, 21st Century |
7 | Hemagglutinin Glycoproteins, Influenza Virus |
7 | Ferrets |
7 | Data Collection |
7 | Air Pollutants |
7 | Adverse Drug Reaction Reporting Systems |
7 | Acetamides |
6 | Viruses |
6 | Virus Shedding |
6 | Virulence |
6 | Temperature |
6 | Sweden |
6 | Serotyping |
6 | Primary Prevention |
6 | Population Dynamics |
6 | Poisson Distribution |
6 | Pneumonia, Viral |
6 | Physicians, Family |
6 | Occupational Diseases |
6 | Lung Diseases, Obstructive |
6 | Horses |
6 | Genetic Variation |
6 | Gastroenteritis |
6 | Forecasting |
6 | Fatal Outcome |
6 | Environmental Exposure |
6 | Drug Resistance, Viral |
6 | Databases, Factual |
6 | Cluster Analysis |
6 | Asia |
6 | Air Pollution |
6 | Absenteeism |
5 | Viral Proteins |
5 | Veterinarians |
5 | Switzerland |
5 | Socioeconomic Factors |
5 | Sex Factors |
5 | Severe Acute Respiratory Syndrome |
5 | Security Measures |
5 | Schizophrenia |
5 | Quality-Adjusted Life Years |
5 | Program Evaluation |
5 | Prognosis |
5 | Prenatal Exposure Delayed Effects |
5 | Pregnancy Complications, Infectious |
5 | Predictive Value of Tests |
5 | Personnel, Hospital |
5 | Patient Education as Topic |
5 | Patient Compliance |
5 | Paramyxoviridae Infections |
5 | Outcome Assessment, Health Care |
5 | Mutation |
5 | Morbidity |
5 | Meat |
5 | Lung Diseases |
5 | Length of Stay |
5 | Interviews as Topic |
5 | Hospitals |
5 | Homes for the Aged |
5 | History, 20th Century |
5 | Health Care Surveys |
5 | Health Behavior |
5 | Guideline Adherence |
5 | France |
5 | Follow-Up Studies |
5 | Fever |
5 | England |
5 | Double-Blind Method |
5 | Disease Notification |
5 | Disaster Planning |
5 | Demography |
5 | Decision Making |
5 | Confidence Intervals |
5 | Communicable Diseases, Emerging |
5 | China |
5 | Charadriiformes |
5 | Attitude to Health |
5 | Anti-Bacterial Agents |
5 | Anseriformes |
5 | Analysis of Variance |
5 | Adjuvants, Immunologic |
5 | Acute Disease |
4 | Zanamivir |
4 | World Health Organization |
4 | Workforce |
4 | Wind |
4 | Wales |
4 | Virology |
4 | Vaccines |
4 | Travel |
4 | Tetanus Toxoid |
4 | Sulfur Dioxide |
4 | Streptococcus pneumoniae |
4 | Statistics as Topic |
4 | Smoking |
4 | Serologic Tests |
4 | Schools |
4 | Residence Characteristics |
4 | Quality Control |
4 | Public Opinion |
4 | Preventive Health Services |
4 | Pilot Projects |
4 | Pharynx |
4 | Parents |
4 | Occupational Exposure |
4 | Mycoplasma Infections |
4 | Linear Models |
4 | Likelihood Functions |
4 | Laboratories |
4 | Japan |
4 | Intention |
4 | Intensive Care Units |
4 | Intensive Care Units, Pediatric |
4 | Immunohistochemistry |
4 | Immunization, Secondary |
4 | History, 19th Century |
4 | Hepatitis B |
4 | Guidelines as Topic |
4 | Geriatric Assessment |
4 | Focus Groups |
4 | European Union |
4 | Epidemiological Monitoring |
4 | Epidemiologic Methods |
4 | Eggs |
4 | Drug-Related Side Effects and Adverse Reactions |
4 | Drug Prescriptions |
4 | Disease Susceptibility |
4 | Containment of Biohazards |
4 | Conjunctivitis, Viral |
4 | Comorbidity |
4 | Community-Acquired Infections |
4 | Coinfection |
4 | Classical Swine Fever |
4 | Chronic Disease |
4 | Chick Embryo |
4 | Cell Line |
4 | Bird Diseases |
4 | Bioterrorism |
4 | Bayes Theorem |
4 | Bacterial Infections |
4 | Agriculture |
4 | Academic Medical Centers |
3 | Workload |
3 | Whole Genome Sequencing |
3 | Weather |
3 | Viral Load |
3 | Vehicle Emissions |
3 | Vaccines, Conjugate |
3 | Syndrome |
3 | Survival Rate |
3 | Stochastic Processes |
3 | Squalene |
3 | Species Specificity |
3 | Spain |
3 | Sick Leave |
3 | Self Report |
3 | Salmonella Infections |
3 | SARS Virus |
3 | Russia |
3 | Respiratory Syncytial Viruses |
3 | Respiration Disorders |
3 | Research Design |
3 | Republic of Korea |
3 | Recurrence |
3 | Randomized Controlled Trials as Topic |
3 | RNA Replicase |
3 | Pulmonary Disease, Chronic Obstructive |
3 | Publications |
3 | Public Health Surveillance |
3 | Pregnancy Trimester, Second |
3 | Pregnancy Outcome |
3 | Portugal |
3 | Population |
3 | Polysorbates |
3 | Poland |
3 | Pneumonia, Pneumococcal |
3 | Pneumonia, Bacterial |
3 | Pharmacovigilance |
3 | Nucleoproteins |
3 | Norway |
3 | Needs Assessment |
3 | Nasopharynx |
3 | Motivation |
3 | Monte Carlo Method |
3 | Molecular Epidemiology |
3 | Meningococcal Infections |
3 | Mass Screening |
3 | Mass Media |
3 | Markov Chains |
3 | Lung |
3 | International Cooperation |
3 | Information Dissemination |
3 | Infectious Disease Transmission, Patient-to-Professional |
3 | Immunization Schedule |
3 | Hygiene |
3 | Herpes Zoster |
3 | Hepatitis B Vaccines |
3 | Heart Failure |
3 | Health Care Costs |
3 | Genome, Viral |
3 | General Practice |
3 | Feasibility Studies |
3 | Farms |
3 | Family Characteristics |
3 | Exercise |
3 | Euthanasia, Animal |
3 | Epidemiologic Studies |
3 | Enzyme Inhibitors |
3 | Electronic Mail |
3 | Disease |
3 | Disabled Persons |
3 | Developed Countries |
3 | Denmark |
3 | Databases as Topic |
3 | Critical Illness |
3 | Cough |
3 | Contact Tracing |
3 | Confounding Factors, Epidemiologic |
3 | Complement Fixation Tests |
3 | Common Cold |
3 | Cloaca |
3 | Clinical Trials as Topic |
3 | Choice Behavior |
3 | Campylobacter Infections |
3 | Biotechnology |
3 | Basic Reproduction Number |
3 | Animals, Domestic |
3 | Amino Acid Substitution |
3 | Agricultural Workers' Diseases |
3 | Aging |
3 | Advisory Committees |
3 | Adenoviridae |
3 | Adenoviridae Infections |
2 | Whooping Cough |
2 | Virus Replication |
2 | Viral Vaccines |
2 | Viral Core Proteins |
2 | Vaccines, Inactivated |
2 | Vaccines, Combined |
2 | Trust |
2 | Treatment Refusal |
2 | Transients and Migrants |
2 | Tetanus |
2 | Tertiary Care Centers |
2 | T-Lymphocytes |
2 | Survival Analysis |
2 | Suriname |
2 | Stroke |
2 | Statistics, Nonparametric |
2 | Spirometry |
2 | Specialization |
2 | Space-Time Clustering |
2 | Social Support |
2 | Social Behavior |
2 | Smoking Cessation |
2 | Sialic Acids |
2 | Sequence Analysis |
2 | Sequence Analysis, RNA |
2 | Schizophrenic Psychology |
2 | Sampling Studies |
2 | Risk Reduction Behavior |
2 | Rhinovirus |
2 | Respirovirus |
2 | Respiratory Sounds |
2 | Respiratory Insufficiency |
2 | Respiration, Artificial |
2 | Research |
2 | Research Personnel |
2 | Refugees |
2 | Reference Standards |
2 | Random Allocation |
2 | Quality of Life |
2 | Quality of Health Care |
2 | Quality Assurance, Health Care |
2 | Pyrans |
2 | Psittacosis |
2 | Pseudorabies |
2 | Proportional Hazards Models |
2 | Product Surveillance, Postmarketing |
2 | Probability |
2 | Population Density |
2 | Population Control |
2 | Point-of-Care Testing |
2 | Point-of-Care Systems |
2 | Placebos |
2 | Pharmacoepidemiology |
2 | Pertussis Vaccine |
2 | Patient Preference |
2 | Patient Participation |
2 | Patient Admission |
2 | Particulate Matter |
2 | Particle Size |
2 | Pain |
2 | Ozone |
2 | Oropharynx |
2 | Occupational Health Services |
2 | Nurses |
2 | Nitrogen Dioxide |
2 | Neutralization Tests |
2 | Neoplasms |
2 | National Institutes of Health (U.S.) |
2 | Mycoplasma |
2 | Mutation, Missense |
2 | Models, Econometric |
2 | Microbial Sensitivity Tests |
2 | Mice |
2 | Metapneumovirus |
2 | Meningococcal Vaccines |
2 | Medicine |
2 | Mathematics |
2 | Mammals |
2 | Malaria |
2 | Long-Term Care |
2 | Ireland |
2 | Informed Consent |
2 | Influenza A Virus, H7N1 Subtype |
2 | Infectious Disease Transmission, Professional-to-Patient |
2 | Infections |
2 | Infection Control |
2 | Independent Living |
2 | Immunoglobulin G |
2 | Immunoglobulin E |
2 | Immunocompromised Host |
2 | Immunization |
2 | Immunity, Maternally-Acquired |
2 | Hypersensitivity |
2 | Humidity |
2 | Hospitals, Teaching |
2 | Hospitals, General |
2 | Hospital Mortality |
2 | Horse Diseases |
2 | Herpes Zoster Vaccine |
2 | Hemagglutinins |
2 | Hemagglutinins, Viral |
2 | Hemagglutination Tests |
2 | Heart Arrest |
2 | Health Services |
2 | Health Services for the Aged |
2 | Health Planning |
2 | Health Facilities |
2 | Health Education |
2 | Guanidines |
2 | Government Agencies |
2 | Geographic Information Systems |
2 | Gastrointestinal Diseases |
2 | Foot-and-Mouth Disease |
2 | Food Safety |
2 | Food Microbiology |
2 | Fluorescent Antibody Technique |
2 | Finland |
2 | Feeding Behavior |
2 | Feces |
2 | Extracorporeal Membrane Oxygenation |
2 | Evidence-Based Medicine |
2 | Environment |
2 | Employment |
2 | Emigration and Immigration |
2 | Electrocardiography |
2 | Efficiency |