Epidemic can be contained via：

• The reduction in interstate mobility:

  1. Such as the wholesale city-wide lockdown in Wuhan and Milan

• The reduction in disease transmissiblity:

  1. Individual level practices, such as improving personal hygiene and maintaining social distance.

  2. Community level interventions, such as business and school closure, and restricting public gathering.

Effectiveness can be evaluated by:

• How long could the epidemic peak be delayed

• How much could the fraction of infected population be reduced