 However, when contact tracing is applied  , the strategy bends the curve leading to a fast suppression of the epidemic outbreak. We illustrate this qualitative difference between the two strategies and identify the factors that explain the effectiveness of contact tracing in sharply reversing the upward trend of the original epidemic curve, causing its bending.
<meaning-changed>  However, when contact tracing is applied  , the strategy bends the curve leading to a fast suppression of the epidemic outbreak. We illustrate this qualitative difference between the two strategies and identify the factors that explain the effectiveness of contact tracing in sharply reversing the upward trend of the original epidemic curve, causing its bending.
 However, when contact tracing is applied , the strategy can bend the curve and suppress the epidemics. Quantitative results are dependent on the network topology. We quantify, the most important indicator of the effectiveness of contact tracing in sharply reversing the upward trend of the original epidemic curve, causing its bending.