We didn't go along with the Chinese plan. Their lockdowns were severe. we didn't come remotely close to what they did. Italy did but that was because it hit them first and their healthcare system was getting crushed.
Lockdowns have been a part of previous pandemic preparedness plans.
This was in 2005.
"c) Closure of office buildings, shopping malls, schools, and public transportation Closure of office buildings, stores, schools, and public transportation systems may be feasible community containment measures during a pandemic. All of these have significant impact on the community and workforce, however, and careful consideration should be focused on their potential effectiveness, how they can most effectively be implemented, and how to maintain critical supplies and infrastructure while limiting community interaction. For example, when public transportation is cancelled, other modes of transportation must be provided for emergency medical services and medical evaluation."
"In extreme circumstances, public heath officials may consider the use of widespread or community-wide quarantine, which is the most stringent and restrictive containment measure"