Simulating SARS-CoV-2 epidemics by region-specific variables and modeling contact tracing app containment

Targeted contact-tracing through mobile phone apps has been proposed as an instrument to help contain the spread of COVID-19 and manage the lifting of nation-wide lock-downs currently in place in USA and Europe. However, there is an ongoing debate on its potential efficacy, especially in light of region-specific demographics. We built an expanded S I R model of COVID-19 epidemics that accounts for region-specific population densities, and we...