Why is quarantine classified as a non-pharmaceutical intervention?

Answer

It does not use drugs or vaccines

A non-pharmaceutical intervention is a public health strategy employed to control the spread of disease without the reliance on medical products such as pharmaceutical drugs or vaccinations. Quarantine functions as this type of intervention because it focuses on controlling the movement and interaction of people to interrupt transmission chains, rather than treating an active infection or providing immunity through medicinal means.

Why is quarantine classified as a non-pharmaceutical intervention?
Definitiondiseaseisolation