  With a two-layer contact-dispersion model and data in China, we analyze the
cost-effectiveness of three types of antiepidemic measures for COVID-19:
regular epidemiological control, local social interaction control, and
inter-city travel restriction. We find that: 1) intercity travel restriction
has minimal or even negative effect compared to the other two at the national
level; 2) the time of reaching turning point is independent of the current
number of cases, and only related to the enforcement stringency of
epidemiological control and social interaction control measures; 3) strong
enforcement at the early stage is the only opportunity to maximize both
antiepidemic effectiveness and cost-effectiveness; 4) mediocre stringency of
social interaction measures is the worst choice. Subsequently, we cluster
countries/regions into four groups based on their control measures and provide
situation assessment and policy suggestions for each group.
