| 373 | Humans |
| 368 | Coronavirus Infections |
| 360 | Betacoronavirus |
| 357 | Pneumonia, Viral |
| 250 | Pandemics |
| 124 | China |
| 93 | SARS Virus |
| 92 | Disease Outbreaks |
| 80 | Animals |
| 70 | Severe Acute Respiratory Syndrome |
| 66 | Coronavirus |
| 61 | Female |
| 59 | Male |
| 48 | Clinical Laboratory Techniques |
| 45 | Adult |
| 44 | Middle Aged |
| 36 | Spike Glycoprotein, Coronavirus |
| 32 | Travel |
| 32 | Aged |
| 31 | Phylogeny |
| 31 | Middle East Respiratory Syndrome Coronavirus |
| 30 | Antiviral Agents |
| 29 | Genome, Viral |
| 28 | Peptidyl-Dipeptidase A |
| 27 | Zoonoses |
| 27 | Public Health |
| 26 | Chiroptera |
| 26 | Child |
| 23 | Young Adult |
| 21 | Global Health |
| 21 | Antibodies, Viral |
| 20 | Infection Control |
| 20 | Adolescent |
| 19 | Viral Vaccines |
| 18 | Risk Factors |
| 18 | Fever |
| 18 | Aged, 80 and over |
| 17 | Retrospective Studies |
| 17 | Italy |
| 17 | Contact Tracing |
| 16 | Receptors, Virus |
| 16 | Child, Preschool |
| 15 | Viral Proteins |
| 15 | RNA, Viral |
| 15 | Quarantine |
| 15 | Cough |
| 15 | Communicable Diseases, Emerging |
| 14 | Tomography, X-Ray Computed |
| 14 | Disease Reservoirs |
| 13 | World Health Organization |
| 13 | Viral Envelope Proteins |
| 13 | Time Factors |
| 13 | Infant |
| 13 | Epidemics |
| 12 | Virus Replication |
| 12 | Real-Time Polymerase Chain Reaction |
| 12 | Medicine, Chinese Traditional |
| 12 | Lung |
| 12 | Amino Acid Sequence |
| 11 | Virus Internalization |
| 11 | Reverse Transcriptase Polymerase Chain Reaction |
| 11 | Population Surveillance |
| 11 | Influenza, Human |
| 11 | Cell Line |
| 10 | Radiography, Thoracic |
| 10 | Protein Binding |
| 10 | Models, Molecular |
| 10 | Infant, Newborn |
| 9 | United States |
| 9 | Republic of Korea |
| 9 | Pregnancy |
| 9 | Disease Transmission, Infectious |
| 9 | Clinical Trials as Topic |
| 9 | Asymptomatic Diseases |
| 8 | Sequence Alignment |
| 8 | Protein Conformation |
| 8 | Practice Guidelines as Topic |
| 8 | Patient Isolation |
| 8 | Mortality |
| 8 | Mice |
| 8 | Mass Screening |
| 8 | Health Personnel |
| 8 | Feces |
| 8 | Computational Biology |
| 8 | Civil Defense |
| 8 | Chlorocebus aethiops |
| 8 | Basic Reproduction Number |
| 8 | Antibodies, Neutralizing |
| 8 | Alanine |
| 7 | Severity of Illness Index |
| 7 | Protein Structure, Tertiary |
| 7 | Protein Domains |
| 7 | Personal Protective Equipment |
| 7 | Models, Theoretical |
| 7 | Incidence |
| 7 | Immunization, Passive |
| 7 | Communicable Disease Control |
| 7 | Australia |
| 7 | Age Factors |
| 6 | Virus Shedding |
| 6 | Virus Attachment |
| 6 | Viral Load |
| 6 | Vero Cells |
| 6 | Sensitivity and Specificity |
| 6 | Risk Assessment |
| 6 | Neoplasms |
| 6 | Interleukin-6 |
| 6 | Infectious Disease Transmission, Patient-to-Professional |
| 6 | Host-Pathogen Interactions |
| 6 | Hospitalization |
| 6 | Health Knowledge, Attitudes, Practice |
| 6 | Disease Progression |
| 6 | Cytokines |
| 6 | Cardiovascular Diseases |
| 6 | Antibodies, Monoclonal |
| 6 | Adenosine Monophosphate |
| 5 | Virus Diseases |
| 5 | United Kingdom |
| 5 | Structure-Activity Relationship |
| 5 | Singapore |
| 5 | Respiratory Insufficiency |
| 5 | Respiratory Distress Syndrome, Adult |
| 5 | Respiration, Artificial |
| 5 | Protein Multimerization |
| 5 | Prognosis |
| 5 | Nucleocapsid Proteins |
| 5 | Nasopharynx |
| 5 | Membrane Glycoproteins |
| 5 | Internationality |
| 5 | Information Dissemination |
| 5 | Influenza A Virus, H1N1 Subtype |
| 5 | Immunoglobulin G |
| 5 | Europe |
| 5 | Epidemiological Monitoring |
| 5 | Dyspnea |
| 5 | Drugs, Chinese Herbal |
| 5 | Drug Repositioning |
| 5 | Drug Discovery |
| 5 | Drug Design |
| 5 | Dose-Response Relationship, Drug |
| 5 | Diarrhea |
| 5 | Critical Illness |
| 5 | Computer Simulation |
| 5 | Comorbidity |
| 5 | Cluster Analysis |
| 5 | Binding Sites |
| 4 | Whole Genome Sequencing |
| 4 | Vaccination |
| 4 | Travel-Related Illness |
| 4 | Serologic Tests |
| 4 | Sequence Analysis, Protein |
| 4 | Sentinel Surveillance |
| 4 | Recombinant Proteins |
| 4 | Public Health Surveillance |
| 4 | Pregnancy Complications, Infectious |
| 4 | Polymerase Chain Reaction |
| 4 | Pharynx |
| 4 | Neutralization Tests |
| 4 | Molecular Structure |
| 4 | Molecular Docking Simulation |
| 4 | Microbial Sensitivity Tests |
| 4 | Lymphopenia |
| 4 | Infectious Disease Incubation Period |
| 4 | Germany |
| 4 | Evolution, Molecular |
| 4 | Epitopes |
| 4 | Emergencies |
| 4 | Disease Susceptibility |
| 4 | Disease Models, Animal |
| 4 | Cohort Studies |
| 4 | Chloroquine |
| 4 | Bronchoalveolar Lavage Fluid |
| 4 | Biological Evolution |
| 4 | Asymptomatic Infections |
| 4 | Antibodies, Monoclonal, Humanized |
| 4 | Angiotensin-Converting Enzyme Inhibitors |
| 4 | Air Travel |
| 3 | Viral Nonstructural Proteins |
| 3 | Vaccines, Synthetic |
| 3 | Uncertainty |
| 3 | Trypsin |
| 3 | T-Lymphocytes |
| 3 | Surveys and Questionnaires |
| 3 | Sputum |
| 3 | Risk |
| 3 | Reproducibility of Results |
| 3 | Recombination, Genetic |
| 3 | RNA Replicase |
| 3 | Public Health Practice |
| 3 | Protein Structure, Secondary |
| 3 | Pharyngitis |
| 3 | Oropharynx |
| 3 | Mutation |
| 3 | Molecular Diagnostic Techniques |
| 3 | Mental Health |
| 3 | Intensive Care Units |
| 3 | Intensive Care Units, Neonatal |
| 3 | Infectious Disease Transmission, Vertical |
| 3 | Immunologic Factors |
| 3 | Immunoglobulin M |
| 3 | Immunization |
| 3 | Hypertension |
| 3 | Hospitals |
| 3 | High-Throughput Nucleotide Sequencing |
| 3 | HIV |
| 3 | HEK293 Cells |
| 3 | Genomics |
| 3 | Genetic Variation |
| 3 | Gene Expression Profiling |
| 3 | France |
| 3 | Forecasting |
| 3 | Fatigue |
| 3 | Epitopes, T-Lymphocyte |
| 3 | Epitopes, B-Lymphocyte |
| 3 | Environmental Microbiology |
| 3 | Endocytosis |
| 3 | Emergency Service, Hospital |
| 3 | Drug Evaluation, Preclinical |
| 3 | Drug Development |
| 3 | Disease Notification |
| 3 | Dipeptidyl Peptidase 4 |
| 3 | Diagnosis, Differential |
| 3 | Delivery of Health Care |
| 3 | DNA, Viral |
| 3 | Cysteine Endopeptidases |
| 3 | Crystallography, X-Ray |
| 3 | Cryoelectron Microscopy |
| 3 | Cross Reactions |
| 3 | Critical Care |
| 3 | Community-Acquired Infections |
| 3 | Centers for Disease Control and Prevention, U.S. |
| 3 | Biomedical Research |
| 3 | Bayes Theorem |
| 3 | Autopsy |
| 3 | Antimalarials |
| 3 | Anti-Inflammatory Agents |
| 3 | Ambulatory Care Facilities |
| 3 | Alphacoronavirus |
| 3 | Age Distribution |
| 3 | Adaptive Immunity |
| 2 | Workflow |
| 2 | Washington |
| 2 | Viruses |
| 2 | Virulence |
| 2 | Virology |
| 2 | Virion |
| 2 | Two-Hybrid System Techniques |
| 2 | Treatment Outcome |
| 2 | Transcriptome |
| 2 | Testis |
| 2 | Telemedicine |
| 2 | Stress, Psychological |
| 2 | Spouses |
| 2 | Societies, Medical |
| 2 | Social Conditions |
| 2 | Signal Transduction |
| 2 | Sex Factors |
| 2 | Seroepidemiologic Studies |
| 2 | Serine Endopeptidases |
| 2 | Sequence Homology, Amino Acid |
| 2 | Respiratory Tract Infections |
| 2 | Respiratory System |
| 2 | Respiratory Protective Devices |
| 2 | Research |
| 2 | Randomized Controlled Trials as Topic |
| 2 | RNA |
| 2 | Public Policy |
| 2 | Proteome |
| 2 | Protein Interaction Mapping |
| 2 | Protein Interaction Domains and Motifs |
| 2 | Protein Conformation, alpha-Helical |
| 2 | Protease Inhibitors |
| 2 | Prevalence |
| 2 | Pregnancy Outcome |
| 2 | Polysaccharides |
| 2 | Politics |
| 2 | Point Mutation |
| 2 | Pneumonia |
| 2 | Plasma |
| 2 | Personnel, Hospital |
| 2 | Perinatal Care |
| 2 | Pediatrics |
| 2 | Patient Care Team |
| 2 | Nucleocapsid |
| 2 | Neuraminidase |
| 2 | Myalgia |
| 2 | Mouth |
| 2 | Molecular Targeted Therapy |
| 2 | Molecular Dynamics Simulation |
| 2 | Models, Animal |
| 2 | Microscopy, Electron, Transmission |
| 2 | Microbial Viability |
| 2 | Metal Nanoparticles |
| 2 | Membrane Fusion |
| 2 | Medical Records |
| 2 | Medical History Taking |
| 2 | Masks |
| 2 | Laboratories |
| 2 | Internet |
| 2 | Interferons |
| 2 | Influenza A virus |
| 2 | Indonesia |
| 2 | Immunosuppressive Agents |
| 2 | Immunoglobulin A |
| 2 | Immunocompromised Host |
| 2 | Immunity, Innate |
| 2 | Immune Evasion |
| 2 | Hypoxia |
| 2 | Human Activities |
| 2 | Hot Temperature |
| 2 | History, 19th Century |
| 2 | Hepacivirus |
| 2 | Hemorrhagic Fever, Ebola |
| 2 | Heart Arrest |
| 2 | Health Planning |
| 2 | Health Facilities |
| 2 | Health Communication |
| 2 | Guidelines as Topic |
| 2 | Gold |
| 2 | Genome |
| 2 | Genetic Engineering |
| 2 | Gastrointestinal Diseases |
| 2 | Furin |
| 2 | Flow Cytometry |
| 2 | Family Health |
| 2 | Extracorporeal Membrane Oxygenation |
| 2 | Evidence-Based Medicine |
| 2 | Eutheria |
| 2 | European Union |
| 2 | Epitope Mapping |
| 2 | Emergency Medical Services |
| 2 | Ebolavirus |
| 2 | Early Diagnosis |
| 2 | Drug Resistance, Viral |
| 2 | Disinfection |
| 2 | Disinfectants |
| 2 | Disaster Planning |
| 2 | Dental Care |
| 2 | Denmark |
| 2 | Cross-Sectional Studies |
| 2 | Consensus |
| 2 | Coinfection |
| 2 | Chikungunya virus |
| 2 | Chest Pain |
| 2 | Cells, Cultured |
| 2 | Cell Fusion |
| 2 | California |
| 2 | CD8-Positive T-Lymphocytes |
| 2 | Brazil |
| 2 | Birds |
| 2 | Base Sequence |
| 2 | Autophagy |
| 2 | Antirheumatic Agents |
| 2 | Antibody-Dependent Enhancement |
| 2 | Angiotensin Receptor Antagonists |
| 2 | Alveolar Epithelial Cells |
| 2 | Algorithms |
| 2 | Airports |
| 2 | Africa |
| 2 | Administration, Intranasal |
| 1 | Zika Virus |
| 1 | Zika Virus Infection |
| 1 | Women's Rights |
| 1 | Women's Health |
| 1 | Water-Electrolyte Balance |
| 1 | Vulnerable Populations |
| 1 | Vomiting |
| 1 | Vitamins |
| 1 | Vitamin D |
| 1 | Virus Latency |
| 1 | Virus Cultivation |
| 1 | Virus Activation |
| 1 | Virulence Factors |
| 1 | Viral Tropism |
| 1 | Viral Plaque Assay |
| 1 | Viral Matrix Proteins |
| 1 | Vesicular stomatitis Indiana virus |
| 1 | Vaccines, DNA |
| 1 | Vaccine-Preventable Diseases |
| 1 | Urology |
| 1 | Urine |
| 1 | Uridine Triphosphate |
| 1 | Universities |
| 1 | Universal Precautions |
| 1 | United States Food and Drug Administration |
| 1 | Ubiquitin |
| 1 | Ubiquitin-Conjugating Enzymes |
| 1 | Twins |
| 1 | Turkey |
| 1 | Tumor Suppressor Protein p53 |
| 1 | Tuberculosis |
| 1 | Triazoles |
| 1 | Triage |
| 1 | Travel Medicine |
| 1 | Transportation |
| 1 | Transmissible gastroenteritis virus |
| 1 | Transfusion Medicine |
| 1 | Transfection |
| 1 | Trace Elements |
| 1 | Torovirus |
| 1 | Toll-Like Receptors |
| 1 | Tissue Distribution |
| 1 | Tilorone |
| 1 | Thrombophilia |
| 1 | Thioguanine |
| 1 | Thiazoles |
| 1 | Thermodynamics |
| 1 | Thailand |
| 1 | Terminology as Topic |
| 1 | Taiwan |
| 1 | Syncope |
| 1 | Switzerland |
| 1 | Swine |
| 1 | Sustainable Development |
| 1 | Survival Analysis |
| 1 | Sulfonamides |
| 1 | Stochastic Processes |
| 1 | Steroids |
| 1 | Steam Bath |
| 1 | State Medicine |
| 1 | Spinocerebellar Degenerations |
| 1 | Specimen Handling |
| 1 | Spain |
| 1 | South America |
| 1 | South Africa |
| 1 | Solubility |
| 1 | Software |
| 1 | Sofosbuvir |
| 1 | Social Support |
| 1 | Social Networking |
| 1 | Social Media |
| 1 | Social Distance |
| 1 | Social Behavior |
| 1 | Smoking |
| 1 | Smartphone |
| 1 | Small Ubiquitin-Related Modifier Proteins |
| 1 | Small Molecule Libraries |
| 1 | Sleep |
| 1 | Skilled Nursing Facilities |
| 1 | Sincalide |
| 1 | Sialic Acids |
| 1 | Shock |
| 1 | Shock, Septic |
| 1 | Ships |
| 1 | Sf9 Cells |
| 1 | Sexually Transmitted Diseases |
| 1 | Sex Distribution |
| 1 | Sex Characteristics |
| 1 | Serine Proteinase Inhibitors |
| 1 | Sequence Homology |
| 1 | Sequence Homology, Nucleic Acid |
| 1 | Self Efficacy |
| 1 | Selection, Genetic |
| 1 | Secondary Prevention |
| 1 | Seasons |
| 1 | Scarlet Fever |
| 1 | Saudi Arabia |
| 1 | Rural Population |
| 1 | Rodentia |
| 1 | Ritonavir |
| 1 | Ribonucleotides |
| 1 | Ribonucleases |
| 1 | Ribavirin |
| 1 | Rheumatic Diseases |
| 1 | Reverse Transcriptase Inhibitors |
| 1 | Respiratory Therapy |
| 1 | Respiratory Syncytial Virus, Human |
| 1 | Resource Allocation |
| 1 | Residence Characteristics |
| 1 | Reproductive Rights |
| 1 | Reproductive Health |
| 1 | Reproductive Health Services |
| 1 | Reproduction |
| 1 | Renin-Angiotensin System |
| 1 | Renal Dialysis |
| 1 | Rectum |
| 1 | Recombinant Fusion Proteins |
| 1 | Receptors, Notch |
| 1 | Receptors, IgG |
| 1 | Receptors, Fc |
| 1 | Receptor, Angiotensin, Type 2 |
| 1 | Reading |
| 1 | Rats |
| 1 | Rats, Inbred Lew |
| 1 | Racism |
| 1 | Rabbits |
| 1 | RNA-Seq |
| 1 | RNA, Small Cytoplasmic |
| 1 | RNA Viruses |
| 1 | RNA Virus Infections |
| 1 | RNA Cleavage |
| 1 | Quality of Health Care |
| 1 | Qualitative Research |
| 1 | Qi |
| 1 | Pyroptosis |
| 1 | Pyrimidines |
| 1 | Pyrazoles |
| 1 | Pyrazines |
| 1 | Public Opinion |
| 1 | Proteolysis |
