First step: Contain an area, seal all roads barring one for entry and exit; public transport is suspended, private vehicles are allowed only in emergencies.
Second step: Complete restrictions in containment zones or clusters where primary and secondary contacts of the infected persons are living.
Third step: Ensure family members of the infected persons, who carry the risk of transmitting the virus, do not step out of house.
The triple lockdown is implemented with help of policemen.