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| confirmed | Confirmed COVID-19 cases |
| death | Confirmed COVID-19 deaths |
| eSAIR | Extended state-space SIR with a subset of the population showing antibody positivity |
| qh.eSIR | Extended state-space SIR with quarantine |
| recovered | Confirmed COVID-19 recovered |
| tvt.eSIR | Fit extended state-space SIR model with time-varying transmission rates |
| tvt.eSIR2 | Fit extended state-space SIR model with time-varying transmission rates |
| USA_state_N | Population of US states |