Tja, was der werte Prof. aber leider nicht sagt, ist, welche Maßnahmen in Südkorea getroffen wurden:
"Infected South Koreans are required to go into isolation in government shelters. Their phones and credit card data are used to trace their prior movements and find their contacts. Those who are determined to have been near the infected individual receive phone alerts with information about their prior movements.
Patients with moderate symptoms are sent to "repurposed corporate training facilities and spaces provided by public institutions," where they receive observation and medical support. Patients who recover and test negative twice are released. Close contacts and infected individuals with minimal symptoms who can measure their own temperatures and whose family members are free of any chronic disease are required to self-quarantine for two weeks. Local monitoring teams calls the quarantined twice a day to make sure that they stay where they are and to ask about symptoms
Those ordered to self-quarantine are required to download an app that alerts officials if the patient moves outside of the quarantine. Violators are fined up to $2,500."

Man versuche mal, das in Deutschland einzuführen ...

Außerdem waren die Südkoreaner selber wohl auch recht proaktiv was Masken & soziale Distanz angeht.