Quantifying the epidemic spread of COVID-19

What does the genetic sequencing data of SARS-CoV-2, the virus causing the COVID-19 disease, tell us? And why is the reproductive number a key quantity in an epidemic for health officials and other decision makers? Professor Tanja Stadler, head of the Computational Evolution Group at the D-BSSE and member of the Swiss COVID-19 Science Task Force, provides an insight into the research of her team on the epidemiology and evolution of COVID-19.