The author notes that a lockdown is not the same as a quarantine. Under lockdown, people only have a limited selection of venues at which they are allowed to gather, meaning those locations are busier and therefore make a virus more transmissible.
“Lockdowns are merely forced gatherings,” writes Briggs. “People in lockdown are allowed to venture forth from their dwellings to do “essential” activities, like spending money at oligarch-run stores. These stores are collection points, where people are concentrated. Some are allowed to go to jobs, such as supporting oligarch-run stores.”