Covid-19: Why is contact tracing useful?

CC-BY-NC-ND 2.0 fabian.hickThe Covid-19 pandemic is the greatest public health threat that Europe has seen in the last 100 years. Countries have thus introduced various levels of lockdown to reduce the number of new infections. Lockdowns, however, come at a great cost to workers, firms and families. Recent epidemiological models also predict that the epidemic will start anew once the lockdown is lifted (Ferguson et al. 2020).
Scientists have thus discussed a second approach to keeping the