| 140 | Humans |
| 128 | COVID-19 |
| 123 | SARS-CoV-2 |
| 111 | Coronavirus Infections |
| 89 | Pandemics |
| 81 | Betacoronavirus |
| 78 | Pneumonia, Viral |
| 61 | Animals |
| 52 | Male |
| 47 | Female |
| 43 | Spike Glycoprotein, Coronavirus |
| 35 | Middle Aged |
| 35 | Genome, Viral |
| 30 | Adult |
| 27 | Phylogeny |
| 26 | Mutation |
| 22 | Angiotensin-Converting Enzyme 2 |
| 20 | Genetic Variation |
| 19 | Aged |
| 18 | China |
| 17 | RNA, Viral |
| 14 | Infectious bronchitis virus |
| 13 | Poultry Diseases |
| 13 | Genotype |
| 13 | Chickens |
| 13 | Antibodies, Neutralizing |
| 12 | Virus Replication |
| 12 | Protein Binding |
| 12 | Antibodies, Viral |
| 11 | Porcine epidemic diarrhea virus |
| 11 | Peptidyl-Dipeptidase A |
| 11 | High-Throughput Nucleotide Sequencing |
| 11 | Evolution, Molecular |
| 11 | Chlorocebus aethiops |
| 10 | Young Adult |
| 10 | Virus Internalization |
| 10 | Viral Vaccines |
| 10 | Vero Cells |
| 10 | Swine |
| 10 | Polymorphism, Single Nucleotide |
| 10 | Mice |
| 10 | Binding Sites |
| 10 | Antiviral Agents |
| 10 | Adolescent |
| 9 | Swine Diseases |
| 9 | Models, Molecular |
| 8 | Serine Endopeptidases |
| 8 | Receptors, Virus |
| 8 | Protein Domains |
| 7 | Sequence Analysis, RNA |
| 7 | Protein Conformation |
| 7 | Lung |
| 7 | Cohort Studies |
| 7 | COVID-19 Vaccines |
| 7 | Amino Acid Substitution |
| 7 | Amino Acid Sequence |
| 6 | Whole Genome Sequencing |
| 6 | Viral Proteins |
| 6 | Viral Nonstructural Proteins |
| 6 | Treatment Outcome |
| 6 | Severity of Illness Index |
| 6 | Recombination, Genetic |
| 6 | Middle East Respiratory Syndrome Coronavirus |
| 6 | Host-Pathogen Interactions |
| 6 | HEK293 Cells |
| 6 | Guillain-Barre Syndrome |
| 6 | Genomics |
| 6 | Genetic Predisposition to Disease |
| 6 | Disease Outbreaks |
| 6 | Cell Line |
| 6 | Aged, 80 and over |
| 5 | Viral Envelope Proteins |
| 5 | Quarantine |
| 5 | Prevalence |
| 5 | Gene Expression |
| 5 | Feces |
| 5 | Europe |
| 5 | Disease Models, Animal |
| 5 | Diarrhea |
| 5 | Coronavirus |
| 5 | Computational Biology |
| 5 | Base Sequence |
| 4 | Virulence |
| 4 | Viral Tropism |
| 4 | Vaccines, Attenuated |
| 4 | Vaccination |
| 4 | United States |
| 4 | Time Factors |
| 4 | Surveys and Questionnaires |
| 4 | Specific Pathogen-Free Organisms |
| 4 | Sequence Deletion |
| 4 | Risk Factors |
| 4 | Real-Time Polymerase Chain Reaction |
| 4 | Protein Interaction Domains and Motifs |
| 4 | Open Reading Frames |
| 4 | Molecular Epidemiology |
| 4 | Molecular Docking Simulation |
| 4 | Miller Fisher Syndrome |
| 4 | Italy |
| 4 | Immunization |
| 4 | Hospitalization |
| 4 | Gene Frequency |
| 4 | Disease Management |
| 4 | Databases, Genetic |
| 4 | Coronavirus Envelope Proteins |
| 4 | Chiroptera |
| 4 | Child |
| 4 | Child, Preschool |
| 4 | Alleles |
| 3 | Viral Load |
| 3 | United Kingdom |
| 3 | Transcription, Genetic |
| 3 | Species Specificity |
| 3 | Social Isolation |
| 3 | Sequence Analysis, DNA |
| 3 | Sequence Alignment |
| 3 | Selection, Genetic |
| 3 | SARS Virus |
| 3 | Reverse Transcriptase Polymerase Chain Reaction |
| 3 | Retrospective Studies |
| 3 | Respiratory Distress Syndrome |
| 3 | RNA-Dependent RNA Polymerase |
| 3 | RNA-Binding Proteins |
| 3 | Public Policy |
| 3 | Protein Stability |
| 3 | Protein Multimerization |
| 3 | Protein Engineering |
| 3 | Prognosis |
| 3 | Pregnancy |
| 3 | Molecular Sequence Annotation |
| 3 | Molecular Dynamics Simulation |
| 3 | Mice, Inbred BALB C |
| 3 | Mesocricetus |
| 3 | Linkage Disequilibrium |
| 3 | Kinetics |
| 3 | Kidney Transplantation |
| 3 | India |
| 3 | Immunoglobulin G |
| 3 | Immunogenicity, Vaccine |
| 3 | Immunity, Innate |
| 3 | Genome-Wide Association Study |
| 3 | Genetic Fitness |
| 3 | Gene Expression Profiling |
| 3 | Furin |
| 3 | Epidemiological Monitoring |
| 3 | England |
| 3 | Disease Progression |
| 3 | Dipeptidyl Peptidase 4 |
| 3 | Diagnosis, Differential |
| 3 | Cysteine Endopeptidases |
| 3 | Cryoelectron Microscopy |
| 3 | Cricetinae |
| 3 | Coronavirus 3C Proteases |
| 3 | Communicable Disease Control |
| 3 | Cells, Cultured |
| 3 | Basic Reproduction Number |
| 3 | Asia |
| 3 | Antibodies, Monoclonal |
| 3 | Alveolar Epithelial Cells |
| 3 | Alphacoronavirus |
| 3 | Adjuvants, Immunologic |
| 2 | Whole Exome Sequencing |
| 2 | Waste Water |
| 2 | Vitamins |
| 2 | Virus Cultivation |
| 2 | Virion |
| 2 | Viral Matrix Proteins |
| 2 | Ultrasonography |
| 2 | Travel-Related Illness |
| 2 | Trachea |
| 2 | Toll-Like Receptors |
| 2 | Toll-Like Receptor 7 |
| 2 | Toll-Like Receptor 3 |
| 2 | Th1 Cells |
| 2 | T-Lymphocytes |
| 2 | Spain |
| 2 | Single-Domain Antibodies |
| 2 | Single-Cell Analysis |
| 2 | Signal Transduction |
| 2 | Severe Acute Respiratory Syndrome |
| 2 | Serial Passage |
| 2 | Sequence Analysis |
| 2 | Sequence Analysis, Protein |
| 2 | Respiratory Tract Infections |
| 2 | Respiration, Artificial |
| 2 | Recombinant Proteins |
| 2 | Receptors, Coronavirus |
| 2 | RNA, Messenger |
| 2 | Quantitative Trait Loci |
| 2 | Proteomics |
| 2 | Prospective Studies |
| 2 | Polymorphism, Genetic |
| 2 | Point Mutation |
| 2 | Phylogeography |
| 2 | North America |
| 2 | Nervous System Diseases |
| 2 | Nasopharynx |
| 2 | Mutation, Missense |
| 2 | Mutagenesis |
| 2 | Murine hepatitis virus |
| 2 | Molecular Typing |
| 2 | Molecular Diagnostic Techniques |
| 2 | Mice, Transgenic |
| 2 | Mice, Inbred C57BL |
| 2 | Metapneumovirus |
| 2 | Mental Health |
| 2 | Membrane Proteins |
| 2 | Longitudinal Studies |
| 2 | Leukocytes, Mononuclear |
| 2 | Kidney |
| 2 | Intestines |
| 2 | Internet |
| 2 | Internationality |
| 2 | Infant, Newborn |
| 2 | Immunosuppressive Agents |
| 2 | Immunoglobulins, Intravenous |
| 2 | Immunoglobulin Fc Fragments |
| 2 | Immunization, Secondary |
| 2 | Immunity, Humoral |
| 2 | Hypoxia |
| 2 | Hypertension |
| 2 | Hydroxychloroquine |
| 2 | Host Specificity |
| 2 | Health Behavior |
| 2 | Haplotypes |
| 2 | HIV-1 |
| 2 | HIV Infections |
| 2 | Glycine |
| 2 | Glucosephosphate Dehydrogenase Deficiency |
| 2 | Glomerulosclerosis, Focal Segmental |
| 2 | Global Health |
| 2 | Genes, Viral |
| 2 | Gene Expression Regulation |
| 2 | Follow-Up Studies |
| 2 | Fever |
| 2 | Eutheria |
| 2 | Epitopes |
| 2 | Epidemics |
| 2 | Endosomes |
| 2 | Cytopathogenic Effect, Viral |
| 2 | Cytokine Release Syndrome |
| 2 | Cross-Sectional Studies |
| 2 | Cross Reactions |
| 2 | Coronavirus, Bovine |
| 2 | Convalescence |
| 2 | Contact Tracing |
| 2 | Computer Simulation |
| 2 | Comorbidity |
| 2 | Clinical Laboratory Techniques |
| 2 | Cities |
| 2 | Cell Line, Tumor |
| 2 | Cattle |
| 2 | Case-Control Studies |
| 2 | COVID-19 Testing |
| 2 | COVID-19 Nucleic Acid Testing |
| 2 | Bronchitis |
| 2 | Biomarkers |
| 2 | Asthma |
| 2 | Asian Continental Ancestry Group |
| 2 | Apolipoprotein L1 |
| 2 | Anxiety |
| 2 | Age Factors |
| 2 | 5' Untranslated Regions |
| 2 | 3' Untranslated Regions |
| 1 | rab GTP-Binding Proteins |
| 1 | Zoonoses |
| 1 | Workload |
| 1 | Weight Loss |
| 1 | Water-Electrolyte Balance |
| 1 | Wastewater-Based Epidemiological Monitoring |
| 1 | Vomiting |
| 1 | Viverridae |
| 1 | Vision Disorders |
| 1 | Viruses |
| 1 | Viroporin Proteins |
| 1 | Viremia |
| 1 | Viral Regulatory and Accessory Proteins |
| 1 | Viral Fusion Proteins |
| 1 | Vietnam |
| 1 | Vesicular stomatitis Indiana virus |
| 1 | Vertebrates |
| 1 | Vaping |
| 1 | Vaccines, Subunit |
| 1 | Vaccines, Inactivated |
| 1 | Vaccines, DNA |
| 1 | Upper Extremity |
| 1 | Up-Regulation |
| 1 | Ubiquitin-Protein Ligases |
| 1 | Turkeys |
| 1 | Trinidad and Tobago |
| 1 | Travel |
| 1 | Translational Medical Research |
| 1 | Transfection |
| 1 | Transduction, Genetic |
| 1 | Tomography, X-Ray Computed |
| 1 | Toll-Like Receptor 8 |
| 1 | Tissue Donors |
| 1 | Time-to-Treatment |
| 1 | Thrombotic Microangiopathies |
| 1 | Thrombocytopenia |
| 1 | Thermodynamics |
| 1 | Thalamus |
| 1 | Thailand |
| 1 | Texas |
| 1 | Temperature |
| 1 | Telemedicine |
| 1 | Taste Disorders |
| 1 | Tandem Mass Spectrometry |
| 1 | Takotsubo Cardiomyopathy |
| 1 | Taiwan |
| 1 | Tachycardia |
| 1 | THP-1 Cells |
| 1 | T-Lymphocytes, Cytotoxic |
| 1 | Systemic Inflammatory Response Syndrome |
| 1 | Switzerland |
| 1 | Sweden |
| 1 | Surge Capacity |
| 1 | Suppressor of Cytokine Signaling 1 Protein |
| 1 | Structure-Activity Relationship |
| 1 | Structural Homology, Protein |
| 1 | State Medicine |
| 1 | Spleen |
| 1 | Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization |
| 1 | Spatio-Temporal Analysis |
| 1 | Snakes |
| 1 | Small Molecule Libraries |
| 1 | Singapore |
| 1 | Shock, Cardiogenic |
| 1 | Ships |
| 1 | Sex Factors |
| 1 | Sewage |
| 1 | Serologic Tests |
| 1 | Sequence Homology, Nucleic Acid |
| 1 | Sequence Homology, Amino Acid |
| 1 | Seoul |
| 1 | Sensitivity and Specificity |
| 1 | Selenium |
| 1 | Saccharomyces cerevisiae |
| 1 | Russia |
| 1 | Rotavirus |
| 1 | Ritonavir |
| 1 | Respiratory Therapy |
| 1 | Respiratory System |
| 1 | Respiratory Mucosa |
| 1 | Respiratory Insufficiency |
| 1 | Respiratory Function Tests |
| 1 | Research Design |
| 1 | Reproducibility of Results |
| 1 | Repressor Proteins |
| 1 | Reinfection |
| 1 | Regulatory Sequences, Ribonucleic Acid |
| 1 | Regional Health Planning |
| 1 | Recombinases |
| 1 | Recombinant Fusion Proteins |
| 1 | Receptors, Fc |
| 1 | Reassortant Viruses |
| 1 | Rats |
| 1 | Rats, Sprague-Dawley |
| 1 | ROC Curve |
| 1 | RNA, Long Noncoding |
| 1 | RNA Interference |
| 1 | Quercetin |
| 1 | Quasispecies |
| 1 | Quail |
| 1 | Pyrazoles |
| 1 | Pulmonary Disease, Chronic Obstructive |
| 1 | Public Health |
| 1 | Psychosocial Functioning |
| 1 | Proventriculus |
| 1 | Proteome |
| 1 | Proteolysis |
| 1 | Protein Subunits |
| 1 | Protein Structure, Secondary |
| 1 | Protein Structure, Quaternary |
| 1 | Protein Processing, Post-Translational |
| 1 | Protein Isoforms |
| 1 | Proline |
| 1 | Principal Component Analysis |
| 1 | Primate Diseases |
| 1 | Pregnancy Complications, Infectious |
| 1 | Postpartum Period |
| 1 | Posterior Leukoencephalopathy Syndrome |
| 1 | Portugal |
| 1 | Polyproteins |
| 1 | Polyneuropathies |
| 1 | Poland |
| 1 | Point-of-Care Systems |
| 1 | Plasmids |
| 1 | Plasma Exchange |
| 1 | Physical Functional Performance |
| 1 | Physical Distancing |
| 1 | Phosphorylation |
| 1 | Phosphoric Triester Hydrolases |
| 1 | Phosphoproteins |
| 1 | Peritonsillar Abscess |
| 1 | Perforin |
| 1 | Peptides |
| 1 | Peptide Library |
| 1 | Peptide Hydrolases |
| 1 | Patient Care |
| 1 | Pangolins |
| 1 | PDZ Domains |
| 1 | Oxygen |
| 1 | Oxalates |
| 1 | Oviducts |
| 1 | Outpatients |
| 1 | Organ Specificity |
| 1 | Ophthalmoplegia |
| 1 | Ophthalmology |
| 1 | Ophthalmologists |
| 1 | Oligodeoxyribonucleotides |
| 1 | Olfactory Mucosa |
| 1 | Olfaction Disorders |
| 1 | Oceania |
| 1 | Occupational Health |
| 1 | Obesity |
| 1 | Nutritional Status |
| 1 | Nutrigenomics |
| 1 | Nucleocapsid Proteins |
| 1 | Nucleic Acid Amplification Techniques |
| 1 | Newcastle disease virus |
| 1 | Newcastle Disease |
| 1 | Neurofilament Proteins |
| 1 | Neural Conduction |
| 1 | Nephrosis, Lipoid |
| 1 | Neoplasms |
| 1 | Neck Muscles |
| 1 | Neanderthals |
| 1 | Naval Medicine |
| 1 | Mutation Rate |
| 1 | Mutagenesis, Site-Directed |
| 1 | Mutagenesis, Insertional |
| 1 | Mustelidae |
| 1 | Muscle Weakness |
| 1 | Multiple Sclerosis |
| 1 | Multigene Family |
| 1 | Mothers |
| 1 | Molecular Structure |
| 1 | Molecular Probes |
| 1 | Models, Theoretical |
| 1 | Models, Statistical |
| 1 | Models, Chemical |
| 1 | Minor Histocompatibility Antigens |
| 1 | Middle East |
| 1 | Microscopy, Electron |
| 1 | Microbodies |
| 1 | MicroRNAs |
| 1 | Methotrexate |
| 1 | Metals, Heavy |
| 1 | Metabolic Networks and Pathways |
| 1 | Membrane Transport Proteins |
| 1 | Membrane Microdomains |
| 1 | Measles virus |
| 1 | Measles Vaccine |
| 1 | Malaria |
| 1 | Magnetic Resonance Imaging |
| 1 | Macrophages |
| 1 | Machine Learning |
| 1 | Macaca mulatta |
| 1 | Lysosomes |
| 1 | Lymphohistiocytosis, Hemophagocytic |
| 1 | Lung Diseases, Interstitial |
| 1 | Lopinavir |
| 1 | Loneliness |
| 1 | Lod Score |
| 1 | Linear Models |
| 1 | Leukemia |
| 1 | Leucovorin |
| 1 | Length of Stay |
| 1 | Kidney Glomerulus |
| 1 | Ion Channels |
| 1 | Intestinal Mucosa |
| 1 | Interpersonal Relations |
| 1 | Internship and Residency |
| 1 | Intermittent Pneumatic Compression Devices |
| 1 | Interleukins |
| 1 | Interferons |
| 1 | Interferon-gamma |
| 1 | Interferon Type I |
| 1 | Intensive Care Units |
| 1 | Inpatients |
| 1 | Injections, Subcutaneous |
| 1 | Injections, Intravenous |
| 1 | Inhibitory Concentration 50 |
| 1 | Influenza, Human |
| 1 | Influenza A virus |
| 1 | Inflammation |
| 1 | Infant |
| 1 | Incidence |
| 1 | Immunotherapy |
| 1 | Immunologic Factors |
| 1 | Immunoglobulins |
| 1 | Immunocompromised Host |
| 1 | Immunity, Cellular |
| 1 | Hypoglossal Nerve Diseases |
| 1 | Hyperoxaluria |
| 1 | Host Microbial Interactions |
| 1 | Hospital Mortality |
| 1 | Hospital Bed Capacity |
| 1 | Homozygote |
