Social distancing instructions on the streets of Watford, UK Stephen Chung/LNP/Shutterstock
LAST month, UK prime minister Boris Johnson said England would have a “world-beating” contact-tracing system in June. But as non-essential shops began reopening in England, the past week has seen two major blows to contact-tracing efforts there.
First, the UK government ditched an overdue National Health Service app designed to automatically detect possible instances of virus transmission between people, after a trial on the Isle of Wight found its use of Bluetooth failed to detect many iPhones running the app. The app was originally due to be rolled out…
