| | LitCovid topic | Subtopics based topic modeling | Keywords |
| | General | Topic1: General1 | — |
| | Mechanism | Topic1: Characteristics | Case, virus, people, smoking, potential, expression, disease, spread, find, level | | Topic2: Clinical features | Cell, infection, clinical, virus, case, acute, respiratory, severe, disease, lymphocyte | | Topic3: Genomic sequence | Sequence, respiratory, virus, phylogenetic, isolate, infection, mutation, strain, cause, acute |
| | Transmission | Topic1: Environment | Rate, case, temperature, fatality, cluster, increase, spread, attack, correlation, size | | Topic2: Different areas | Transmission, disease, infection, rate, region, case, outbreak, report, measure, sample | | Topic3: Modes | Case, transmission, travel, cluster, age, early, global, report, individual, infection |
| | Diagnosis | Topic1: Infection | Infection, case, disease, risk, chest, severe, clinical, symptom, evaluate, report | | Topic2: Risk factors | Mortality, clinical, outcome, risk, disease, diabetes, hospital, age, death, factor | | Topic3: Symptoms | Case, symptom, age, clinical, mortality, disease, positive, infection, test, confirm |
| | Treatment | Topic1: Clinical features of mortality | Clinical, mortality, case, risk, hospital, factor, value, confirm, report, age | | Topic2: Clinical features of the disease | Disease, clinical, case, mortality, outcome, severe, infection, risk, age, rate | | Topic3: Drug | Control, trial, treatment, clinical, cell, drug, vitamin, receive, level, disease | | Topic4: Outcome | Trial, clinical, treatment, outcome, control, intervention, participant, arm, randomization, registration |
| | Prevention | Topic1: Behaviors | Pandemic, health, disease, care, risk, control, outbreak, dental, infection, intervention | | Topic2: Management | Pandemic, hospital, health, stroke, knowledge, disease, management, base, care, infection | | Topic3: Policy | Pandemic, public, health, people, infection, policy, risk, disease, model, case | | Topic4: Control | Case, pandemic, disease, risk, control, spread, outbreak, infection, epidemic, people | | Topic5: Other diseases | Pandemic, outbreak, health, infection, report, care, trauma, increase, case, review | | Topic6: Pandemic status | Case, model, rate, death, spread, pandemic, measure, confirm, mortality, estimate |
| | Case report | Topic1: Children | Case, clinical, infection, acute, test, child, report, syndrome, respiratory, neonate | | Topic2: New symptoms | Case, report, liver, manifestation, infection, symptom, clinical, cutaneous, disease, respiratory | | Topic3: Pregnant | Report, infection, case, old, pregnant woman, chest, treatment, refer, pandemic, hospitalize | | Topic4: Death | Report, case, disease, respiratory, acute, novel, rate, death, fetal, severe |
| | Forecasting | Topic1: Estimate | Case, estimate, model, epidemic, death, predict, confirm, trend, outbreak, base | | Topic2: Modeling | Model, case, spread, rate, confirm, death, predict, pandemic, prediction, trend | | Topic3: Epidemic | Model, case, estimate, trend, base, policy, disease, infection, epidemic, prediction | | Topic4: Spread | Case, base, pandemic, spread, region, weather, mean, humidity, temperature, estimate |
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