In Singapore, recently returned citizens must share their phones’ location data with the authorities each day to prove they are sticking to government-ordered quarantines.
In Hong Kong, a 13-year-old girl, who was spotted out at a restaurant wearing a tracking bracelet to monitor those in quarantine, was followed, filmed and subsequently shamed online.
South Korea imposed stricter controls, requiring incoming foreigners to quarantine in government facilities for 14 days upon arrival.
Which has been praised globally for flattening the curve quickly after an early explosive peak in infections, initially required travelers from some countries to quarantine.
Ms. Lam said that more than 200,000 people were currently being quarantined at home.
The Japanese government relies on trust that those in quarantine stay cloistered.
After a recent posting to a ship based in Singapore, he was required to quarantine at home in Japan for 14 days when he returned.