Apparently, everyone that visits a particular park or part of town, or has a particular appearance^H^H^H^H undefined smell is OK already. So, just start regula

Apparently, everyone that visits a particular park or part of town, or has a particular appearance^H^H^H^H undefined smell is OK already. So, just start regularly screening people in places where political rallies tend to be. (Or just target the attendees in the areas where they live.)