Beginning on May 20, a "telecom monitoring system" was launched for the 12,000 category A people (i.e. persons who had been in direct contact with a known SARS case) to prevent them from "sneaking around" and posing a risk to society.
為了落實居家隔離政策，五月十二日開始，對於一萬多名有接觸過病患的 A 級居家隔離者，內政部更進一步啟動「視訊追蹤管制系統」，以免他們「趴趴走」，對社會造成威脅。