Table 2 List of abbreviations
From: The impact of digital contact tracing on the SARS-CoV-2 pandemic—a comprehensive modelling study
Symbol | Description |
|---|---|
COVID-19 | Coronavirus disease 2019 |
SARS-CoV-2 | Severe acute respiratory syndrome coronavirus 2 |
DCT | Digital Contact Tracing |
DCTS | Digital Contact Tracing Service |
\({R_{0}}\) | Basic reproduction number without interventions |
\({R_{e}}\) | Effective reproduction number |
τ | Time since infection |
\({T_{\mathrm {lat}}}\) | Latency period |
\({T_{\mathrm {Inc}}}\) | Incubation period |
\({T_{\mathrm {con}}}\) | Contagious period |
\({n_{c}}\) | Number of contacts per day |
\({\beta _{i}}\) | Infection rate per day |
α | Fraction symptomatic cases |
\({f_{m}}\) | Fraction of symptomatic cases that see a doctor |
\({\eta _{\mathrm {DCT}}}\) | Fraction of successful traces between users of the DCT |
\({p_{m}}\) | Fraction of medical tests with true positive result |
\({ p_{\mathrm {app}}}\) | Fraction of the population that uses the DCTS |
\({T_{\mathrm {delay}}}\) | Delay time for tracing contacts of an index case |
\({f_{\mathrm {RT}}}\) | Fraction of the population randomly tested per day |
\({f_{\mathrm {SD}}}\) | Social distancing factor |
\({T_{2}}\) | Doubling time |
λ | Exponential growth parameter |
S | Susceptible compartment |
E | Exposed compartment |
I | Infected compartment |
R | Removed compartment |