| 107 | Humans (MeSH) |
| 107 | COVID-19 (MeSH) |
| 73 | SARS-CoV-2 (MeSH) |
| 71 | Pandemics (MeSH) |
| 64 | Pneumonia, Viral (epidemiology) |
| 64 | Coronavirus Infections (epidemiology) |
| 58 | Betacoronavirus (MeSH) |
| 34 | Coronavirus Infections (prevention & control) |
| 32 | Pneumonia, Viral (prevention & control) |
| 32 | Pandemics (prevention & control) |
| 31 | Pneumonia, Viral (transmission) |
| 31 | Male (MeSH) |
| 31 | Coronavirus Infections (transmission) |
| 30 | Female (MeSH) |
| 25 | Adult (MeSH) |
| 23 | Middle Aged (MeSH) |
| 17 | Aged (MeSH) |
| 13 | Young Adult (MeSH) |
| 13 | Pneumonia, Viral (virology) |
| 13 | Pneumonia, Viral (MeSH) |
| 13 | Coronavirus Infections (virology) |
| 13 | Coronavirus Infections (MeSH) |
| 12 | Pneumonia, Viral (psychology) |
| 12 | Coronavirus Infections (psychology) |
| 11 | United States (epidemiology) |
| 11 | Pneumonia, Viral (therapy) |
| 11 | Coronavirus Infections (therapy) |
| 11 | Coronavirus Infections (diagnosis) |
| 11 | Adolescent (MeSH) |
| 10 | Disease Outbreaks (MeSH) |
| 10 | Child (MeSH) |
| 9 | Pneumonia, Viral (diagnosis) |
| 8 | Betacoronavirus (isolation & purification) |
| 7 | Restaurants (MeSH) |
| 7 | Coronavirus Infections (immunology) |
| 6 | Treatment Outcome (MeSH) |
| 6 | Pneumonia, Viral (immunology) |
| 6 | Infection Control (methods) |
| 6 | Coronavirus (MeSH) |
| 5 | Risk Factors (MeSH) |
| 5 | Risk Assessment (MeSH) |
| 5 | Public Health (MeSH) |
| 5 | Pneumonia, Viral (mortality) |
| 5 | Pneumonia, Viral (complications) |
| 5 | Pandemics (statistics & numerical data) |
| 5 | Music (MeSH) |
| 5 | Motion Pictures (MeSH) |
| 5 | Delivery of Health Care (organization & administration) |
| 5 | Coronavirus Infections (mortality) |
| 5 | Coronavirus Infections (complications) |
| 5 | China (MeSH) |
| 5 | Aged, 80 and over (MeSH) |
| 5 | Aerosols (MeSH) |
| 4 | United Kingdom (MeSH) |
| 4 | Surveys and Questionnaires (MeSH) |
| 4 | Practice Guidelines as Topic (MeSH) |
| 4 | Pneumonia, Viral (drug therapy) |
| 4 | Pneumonia, Viral (diagnostic imaging) |
| 4 | Infectious Disease Transmission, Patient-to-Professional (prevention & control) |
| 4 | Infection Control (standards) |
| 4 | Fear (MeSH) |
| 4 | Coronavirus Infections (drug therapy) |
| 4 | Coronavirus Infections (diagnostic imaging) |
| 4 | Contact Tracing (MeSH) |
| 4 | China (epidemiology) |
| 4 | Child, Preschool (MeSH) |
| 3 | Viral Vaccines (immunology) |
| 3 | Ventilation (MeSH) |
| 3 | United States (MeSH) |
| 3 | Tomography, X-Ray Computed (methods) |
| 3 | Social Isolation (MeSH) |
| 3 | Republic of Korea (epidemiology) |
| 3 | Recreation (MeSH) |
| 3 | Radiography, Thoracic (methods) |
| 3 | Quarantine (psychology) |
| 3 | Psychological Distance (MeSH) |
| 3 | Prospective Studies (MeSH) |
| 3 | Pregnancy (MeSH) |
| 3 | Population Surveillance (MeSH) |
| 3 | Pneumonia, Viral (economics) |
| 3 | Pandemics (economics) |
| 3 | Models, Theoretical (MeSH) |
| 3 | Masks (MeSH) |
| 3 | Internet (MeSH) |
| 3 | Infant (MeSH) |
| 3 | Incidence (MeSH) |
| 3 | Health Personnel (psychology) |
| 3 | Global Health (MeSH) |
| 3 | Disease Transmission, Infectious (prevention & control) |
| 3 | Disease Outbreaks (prevention & control) |
| 3 | Delivery of Health Care (trends) |
| 3 | Critical Care (methods) |
| 3 | Coronavirus Infections (economics) |
| 3 | Communicable Disease Control (organization & administration) |
| 3 | COVID-19 Vaccines (MeSH) |
| 3 | Betacoronavirus (physiology) |
| 3 | Betacoronavirus (pathogenicity) |
| 3 | Air Conditioning (MeSH) |
| 2 | Videoconferencing (MeSH) |
| 2 | United Kingdom (epidemiology) |
| 2 | Tomography, X-Ray Computed (statistics & numerical data) |
| 2 | Time Factors (MeSH) |
| 2 | Telemedicine (organization & administration) |
| 2 | Societies, Medical (MeSH) |
| 2 | Severe Acute Respiratory Syndrome (diagnostic imaging) |
| 2 | Self Report (MeSH) |
| 2 | Schools (organization & administration) |
| 2 | Schools (MeSH) |
| 2 | Retrospective Studies (MeSH) |
| 2 | Respiration, Artificial (MeSH) |
| 2 | Residence Characteristics (MeSH) |
| 2 | Randomized Controlled Trials as Topic (MeSH) |
| 2 | Radiography, Thoracic (statistics & numerical data) |
| 2 | Quarantine (MeSH) |
| 2 | Public Health (methods) |
| 2 | Psychotherapy (MeSH) |
| 2 | Personal Protective Equipment (standards) |
| 2 | Patient Safety (MeSH) |
| 2 | Outpatients (MeSH) |
| 2 | Otolaryngology (methods) |
| 2 | Organizational Innovation (MeSH) |
| 2 | Mass Screening (MeSH) |
| 2 | Life Style (MeSH) |
| 2 | Japan (epidemiology) |
| 2 | Intensive Care Units (MeSH) |
| 2 | Infectious Disease Transmission, Professional-to-Patient (prevention & control) |
| 2 | Infection Control (organization & administration) |
| 2 | Infection Control (MeSH) |
| 2 | Hospitalization (MeSH) |
| 2 | Heart Transplantation (MeSH) |
| 2 | Health Promotion (MeSH) |
| 2 | Health Policy (legislation & jurisprudence) |
| 2 | Hand Disinfection (MeSH) |
| 2 | Forecasting (MeSH) |
| 2 | Filtration (MeSH) |
| 2 | Family Characteristics (MeSH) |
| 2 | Extracorporeal Membrane Oxygenation (MeSH) |
| 2 | Exercise (MeSH) |
| 2 | Europe (epidemiology) |
| 2 | Early Termination of Clinical Trials (MeSH) |
| 2 | Developing Countries (MeSH) |
| 2 | Delivery of Health Care (methods) |
| 2 | Databases, Factual (MeSH) |
| 2 | Crowding (MeSH) |
| 2 | Cross Infection (prevention & control) |
| 2 | Communication (MeSH) |
| 2 | Communicable Disease Control (methods) |
| 2 | Commerce (statistics & numerical data) |
| 2 | Commerce (MeSH) |
| 2 | Cluster Analysis (MeSH) |
| 2 | Clinical Laboratory Techniques (methods) |
| 2 | COVID-19 Testing (MeSH) |
| 2 | Betacoronavirus (genetics) |
| 2 | Alcohol Drinking (epidemiology) |
| 2 | Air Microbiology (MeSH) |
| 2 | Air Conditioning (adverse effects) |
| 2 | Aerosols (adverse effects) |
| 1 | Yoga (MeSH) |
| 1 | World Health Organization (MeSH) |
| 1 | Washington (epidemiology) |
| 1 | Washington (MeSH) |
| 1 | Vulnerable Populations (psychology) |
| 1 | Vulnerable Populations (MeSH) |
| 1 | Voice Disorders (virology) |
| 1 | Voice Disorders (surgery) |
| 1 | Voice Disorders (diagnosis) |
| 1 | Vitamins (MeSH) |
| 1 | Virus Diseases (virology) |
| 1 | Virus Diseases (immunology) |
| 1 | Virginia (MeSH) |
| 1 | Viral Vaccines (pharmacology) |
| 1 | Viral Vaccines (chemistry) |
| 1 | Viral Load (MeSH) |
| 1 | Vietnam (epidemiology) |
| 1 | Video Recording (MeSH) |
| 1 | Ventilation (standards) |
| 1 | Vascular Surgical Procedures (organization & administration) |
| 1 | Vascular Surgical Procedures (adverse effects) |
| 1 | Vaccination (MeSH) |
| 1 | Ultraviolet Rays (MeSH) |
| 1 | Ultrasonography, Prenatal (methods) |
| 1 | Ultrasonography, Doppler (statistics & numerical data) |
| 1 | Ultrasonography, Doppler (methods) |
| 1 | Tuberculosis, Pulmonary (therapy) |
| 1 | Tuberculosis, Pulmonary (prevention & control) |
| 1 | Tuberculosis, Pulmonary (diagnosis) |
| 1 | Trust (MeSH) |
| 1 | Triage (organization & administration) |
| 1 | Triage (methods) |
| 1 | Treatment Failure (MeSH) |
| 1 | Travel Medicine (MeSH) |
| 1 | Travel (MeSH) |
| 1 | Transportation (standards) |
| 1 | Transplant Recipients (MeSH) |
| 1 | Tracheotomy (methods) |
| 1 | Tracheostomy (methods) |
| 1 | Trace Elements (MeSH) |
| 1 | Tomography, X-Ray Computed (standards) |
| 1 | Time-to-Treatment (MeSH) |
| 1 | Thrombolytic Therapy (statistics & numerical data) |
| 1 | Thrombectomy (MeSH) |
| 1 | Texas (epidemiology) |
| 1 | Tetrazoles (therapeutic use) |
| 1 | Terminal Care (MeSH) |
| 1 | Television (MeSH) |
| 1 | Telemedicine (methods) |
| 1 | Telemedicine (MeSH) |
| 1 | Surgeons (psychology) |
| 1 | Surge Capacity (organization & administration) |
| 1 | Surge Capacity (ethics) |
| 1 | Suicide (statistics & numerical data) |
| 1 | Stroke Volume (MeSH) |
| 1 | Stroke (therapy) |
| 1 | Stroke (epidemiology) |
| 1 | Stroke (complications) |
| 1 | Stress, Psychological (therapy) |
| 1 | Stress, Psychological (psychology) |
| 1 | Stress, Psychological (prevention & control) |
| 1 | Stem Cell Transplantation (methods) |
| 1 | Stem Cell Transplantation (economics) |
| 1 | Statistics as Topic (MeSH) |
| 1 | Spirituality (MeSH) |
| 1 | Spike Glycoprotein, Coronavirus (metabolism) |
| 1 | Specimen Handling (MeSH) |
| 1 | Spain (MeSH) |
| 1 | South America (epidemiology) |
| 1 | Socioeconomic Factors (MeSH) |
| 1 | Societies, Medical (organization & administration) |
| 1 | Social Support (MeSH) |
| 1 | Social Stigma (MeSH) |
| 1 | Social Isolation (psychology) |
| 1 | Social Determinants of Health (MeSH) |
| 1 | Singing (MeSH) |
| 1 | Singapore (epidemiology) |
| 1 | Singapore (MeSH) |
| 1 | Siblings (MeSH) |
| 1 | Shock (etiology) |
| 1 | Shock (drug therapy) |
| 1 | Sex Workers (statistics & numerical data) |
| 1 | Severe Acute Respiratory Syndrome (pathology) |
| 1 | Severe Acute Respiratory Syndrome (epidemiology) |
| 1 | Severe Acute Respiratory Syndrome (MeSH) |
| 1 | Serologic Tests (MeSH) |
| 1 | Seroepidemiologic Studies (MeSH) |
| 1 | Sensitivity and Specificity (MeSH) |
| 1 | Self Care (MeSH) |
| 1 | Sedentary Behavior (MeSH) |
| 1 | Seasons (MeSH) |
| 1 | Search Engine (MeSH) |
| 1 | Seafood (statistics & numerical data) |
| 1 | Saliva (MeSH) |
| 1 | Safety Management (MeSH) |
| 1 | SARS Virus (physiology) |
| 1 | SARS Virus (MeSH) |
| 1 | Rural Population (MeSH) |
| 1 | Risk Assessment (methods) |
| 1 | Reverse Transcriptase Polymerase Chain Reaction (MeSH) |
| 1 | Restaurants (trends) |
| 1 | Restaurants (statistics & numerical data) |
| 1 | Restaurants (standards) |
| 1 | Restaurants (organization & administration) |
| 1 | Respiratory Distress Syndrome (etiology) |
| 1 | Respiratory Distress Syndrome (drug therapy) |
| 1 | Respiration, Artificial (statistics & numerical data) |
| 1 | Respiration, Artificial (methods) |
| 1 | Respiration (MeSH) |
| 1 | Resource Allocation (organization & administration) |
| 1 | Research Personnel (psychology) |
| 1 | Research Design (MeSH) |
| 1 | Republic of Korea (MeSH) |
| 1 | Reproductive Health (trends) |
| 1 | Reperfusion (MeSH) |
| 1 | Referral and Consultation (statistics & numerical data) |
| 1 | Radionuclide Imaging (standards) |
| 1 | Radionuclide Imaging (methods) |
| 1 | Radiology Department, Hospital (organization & administration) |
| 1 | Radiologists (standards) |
| 1 | Radiologists (organization & administration) |
| 1 | Radiography, Thoracic (standards) |
| 1 | Radiography, Thoracic (MeSH) |
| 1 | Quebec (epidemiology) |
| 1 | Quality Improvement (MeSH) |
| 1 | Pulmonary Medicine (MeSH) |
| 1 | Public Policy (MeSH) |
| 1 | Public Opinion (MeSH) |
| 1 | Public Health Administration (MeSH) |
| 1 | Public Health (trends) |
| 1 | Public Health (standards) |
| 1 | Public Health (ethics) |
| 1 | Psychology, Child (MeSH) |
| 1 | Psychological Trauma (ethnology) |
| 1 | Program Development (MeSH) |
| 1 | Probiotics (therapeutic use) |
| 1 | Probability (MeSH) |
| 1 | Primates (MeSH) |
| 1 | Prevalence (MeSH) |
| 1 | Pregnancy, Unwanted (MeSH) |
| 1 | Pregnancy Complications, Infectious (psychology) |
| 1 | Pregnancy Complications, Infectious (prevention & control) |
| 1 | Practice Guidelines as Topic (standards) |
| 1 | Povidone-Iodine (therapeutic use) |
| 1 | Postnatal Care (MeSH) |
| 1 | Population Density (MeSH) |
| 1 | Policy Making (MeSH) |
| 1 | Point-of-Care Testing (MeSH) |
| 1 | Pneumonia, Viral (pathology) |
| 1 | Pneumonia, Viral (nursing) |
| 1 | Pneumonia, Viral (microbiology) |
| 1 | Pneumonia, Viral (metabolism) |
| 1 | Pneumonia, Viral (blood) |
| 1 | Pneumonia (urine) |
| 1 | Pneumonia (drug therapy) |
| 1 | Pneumonia (diagnosis) |
| 1 | Pneumonia (MeSH) |
| 1 | Physicians (psychology) |
| 1 | Physicians (MeSH) |
| 1 | Physical Fitness (MeSH) |
| 1 | Physical Education and Training (methods) |
| 1 | Philippines (MeSH) |
| 1 | Pharmacy (methods) |
| 1 | Persons With Hearing Impairments (MeSH) |
| 1 | Personal Protective Equipment (supply & distribution) |
| 1 | Perioperative Care (standards) |
| 1 | Perioperative Care (methods) |
| 1 | Peptide Fragments (metabolism) |
| 1 | Pediatrics (standards) |
| 1 | Patient-Centered Care (organization & administration) |
| 1 | Patient Selection (MeSH) |
| 1 | Patient Safety (standards) |
| 1 | Patient Isolation (MeSH) |
| 1 | Patient Care Team (MeSH) |
| 1 | Particle Size (MeSH) |
| 1 | Outcome Assessment, Health Care (MeSH) |
| 1 | Otolaryngology (standards) |
| 1 | Orthomyxoviridae (MeSH) |
| 1 | Organizational Objectives (MeSH) |
| 1 | Olanzapine (therapeutic use) |
| 1 | Olanzapine (administration & dosage) |
| 1 | Ohio (epidemiology) |
| 1 | Occupational Stress (psychology) |
| 1 | Occupational Stress (prevention & control) |
| 1 | Occupational Health (MeSH) |
| 1 | Occupational Exposure (prevention & control) |
| 1 | Obstetrics (MeSH) |
| 1 | Nutrition Surveys (MeSH) |
| 1 | Nutrients (MeSH) |
| 1 | Nursing (MeSH) |
| 1 | Nurses (psychology) |
| 1 | Nuclear Medicine Department, Hospital (standards) |
| 1 | Nuclear Medicine Department, Hospital (organization & administration) |
| 1 | Neutrophils (drug effects) |
| 1 | Network Meta-Analysis (MeSH) |
| 1 | Neoplasms (diagnostic imaging) |
| 1 | Nature (MeSH) |
| 1 | Natriuretic Peptide, Brain (metabolism) |
| 1 | Nanostructures (MeSH) |
| 1 | Myoclonus (therapy) |
| 1 | Myoclonus (etiology) |
| 1 | Myoclonus (diagnosis) |
| 1 | Music Therapy (MeSH) |
| 1 | Motivation (MeSH) |
| 1 | Motion (MeSH) |
| 1 | Mothers (psychology) |
| 1 | Monitoring, Physiologic (methods) |
| 1 | Models, Economic (MeSH) |
| 1 | Minimally Invasive Surgical Procedures (standards) |
| 1 | Minimally Invasive Surgical Procedures (adverse effects) |
| 1 | Mind-Body Therapies (MeSH) |
| 1 | Mental Health (trends) |
| 1 | Mental Health (MeSH) |
| 1 | Mental Disorders (prevention & control) |
| 1 | Mental Disorders (epidemiology) |
| 1 | Medicine in the Arts (MeSH) |
| 1 | Medicine in Literature (MeSH) |
| 1 | Massachusetts (MeSH) |
| 1 | Mass Spectrometry (MeSH) |
| 1 | Mass Media (MeSH) |
| 1 | Marketing (MeSH) |
| 1 | Mandatory Testing (standards) |
| 1 | Lung Transplantation (MeSH) |
| 1 | Lung Diseases (surgery) |
| 1 | Lung Diseases (diagnostic imaging) |
| 1 | Lung Diseases (complications) |
| 1 | Longitudinal Studies (MeSH) |
| 1 | Long-Term Care (MeSH) |
| 1 | Locomotion (MeSH) |
| 1 | Liver Transplantation (MeSH) |
| 1 | Literature, Modern (MeSH) |
| 1 | Linear Models (MeSH) |
| 1 | Liechtenstein (epidemiology) |
| 1 | Licensure (legislation & jurisprudence) |
| 1 | Levofloxacin (therapeutic use) |
| 1 | Legionnaires' Disease (urine) |
| 1 | Legionnaires' Disease (drug therapy) |
| 1 | Legionnaires' Disease (diagnosis) |
| 1 | Legionella pneumophila (isolation & purification) |
| 1 | Legionella (isolation & purification) |
| 1 | Kidney Transplantation (MeSH) |
| 1 | Kidney Failure, Chronic (surgery) |
| 1 | Kidney Failure, Chronic (complications) |
| 1 | Kentucky (epidemiology) |
| 1 | Japan (MeSH) |
| 1 | Italy (epidemiology) |
| 1 | Intubation, Intratracheal (methods) |
| 1 | Intubation, Intratracheal (adverse effects) |
| 1 | Intraoperative Care (standards) |
| 1 | Intraoperative Care (methods) |
| 1 | Internationality (MeSH) |
| 1 | International Health Regulations (MeSH) |
| 1 | Interleukin-8 (physiology) |
| 1 | Inhalation Exposure (prevention & control) |
| 1 | Inhalation Exposure (MeSH) |
| 1 | Information Seeking Behavior (MeSH) |
| 1 | Influenza, Human (virology) |
| 1 | Influenza, Human (epidemiology) |
| 1 | Influenza Vaccines (MeSH) |
| 1 | Infectious Disease Transmission, Vertical (prevention & control) |
| 1 | Infection Control (economics) |
| 1 | Infant, Newborn (MeSH) |
| 1 | Industry (MeSH) |
| 1 | Indiana (epidemiology) |
| 1 | India (epidemiology) |
| 1 | Income (MeSH) |
| 1 | Immunosuppression (methods) |
| 1 | Immunosuppression (adverse effects) |
| 1 | Immunoglobulin G (immunology) |
| 1 | Immunoglobulin G (blood) |
| 1 | Immunity, Herd (MeSH) |
| 1 | Hypoxia (MeSH) |
| 1 | Hypotension (chemically induced) |
| 1 | Hydroxychloroquine (therapeutic use) |
| 1 | Hydroxychloroquine (adverse effects) |
| 1 | Hydrocortisone (adverse effects) |
| 1 | Hydrocortisone (administration & dosage) |
| 1 | Host-Pathogen Interactions (MeSH) |
| 1 | Hospitals, University (MeSH) |
| 1 | Hospitals (MeSH) |
| 1 | Hospitalization (statistics & numerical data) |
| 1 | Hospice Care (MeSH) |
| 1 | Hockey (MeSH) |
| 1 | Heating (standards) |
| 1 | Heating (adverse effects) |
| 1 | Heart-Assist Devices (MeSH) |
| 1 | Heart Failure (surgery) |
| 1 | Heart Failure (physiopathology) |
| 1 | Heart Failure (metabolism) |
| 1 | Heart Failure (drug therapy) |
| 1 | Heart Failure (complications) |
| 1 | Health Services Needs and Demand (organization & administration) |
| 1 | Health Resources (MeSH) |
| 1 | Health Promotion (methods) |
| 1 | Health Priorities (MeSH) |
| 1 | Health Policy (MeSH) |
| 1 | Health Planning (MeSH) |
| 1 | Health Personnel (education) |
| 1 | Health Knowledge, Attitudes, Practice (MeSH) |
| 1 | Health Facilities (standards) |
| 1 | Health Education (methods) |
| 1 | Health Communication (methods) |
| 1 | Health Communication (MeSH) |
| 1 | Health Behavior (MeSH) |
| 1 | Headache (etiology) |
| 1 | Hand Hygiene (MeSH) |
| 1 | Guidelines as Topic (MeSH) |
| 1 | Gross Domestic Product (MeSH) |
| 1 | Glomerular Filtration Rate (MeSH) |
| 1 | Global Health (trends) |
| 1 | Georgia (MeSH) |
| 1 | Gastrointestinal Microbiome (immunology) |
| 1 | Garlic (MeSH) |
| 1 | France (MeSH) |
| 1 | Foodborne Diseases (MeSH) |
| 1 | Food Supply (methods) |
| 1 | Food Supply (MeSH) |
| 1 | Food Safety (MeSH) |
| 1 | Food Packaging (trends) |
| 1 | Food Packaging (instrumentation) |
| 1 | Food Industry (trends) |
| 1 | Food Industry (instrumentation) |
| 1 | Food Handling (MeSH) |
| 1 | Food Contamination (MeSH) |
| 1 | Food Chain (MeSH) |
| 1 | Food (statistics & numerical data) |
| 1 | Follow-Up Studies (MeSH) |
| 1 | Florida (epidemiology) |
| 1 | Fitness Trackers (MeSH) |
| 1 | Fever (etiology) |
| 1 | Feeding Behavior (psychology) |
| 1 | Feeding Behavior (MeSH) |
| 1 | Feasibility Studies (MeSH) |
| 1 | Fatty Acids, Omega-3 (MeSH) |
| 1 | Famous Persons (MeSH) |
| 1 | Family Planning Services (trends) |
| 1 | Family (MeSH) |
| 1 | Faith-Based Organizations (MeSH) |
| 1 | Eye Infections, Viral (prevention & control) |
| 1 | Excipients (pharmacology) |
| 1 | Excipients (chemistry) |
| 1 | Europe (MeSH) |
| 1 | Ethnic Groups (MeSH) |
