Spit into a cup when you land in an airport, and your DNA is stored. Every phone in every city talks to every other nearby device. Cross-border travel is enabled only by governments sharing data about millions of private movements. These are all possible visions of a future that the coronavirus pandemic has rushed on us. But a lurch into an even more intense era of mass data-collection - the vast hoovering up of who went near whom and when, who is healthy to travel, and even scraps of personal DNA languishing in databases - appears to be on the verge of becoming the new reality. It took the attacks of September 11, 2001 to shove aside the previous decade's phobia of mass surveillance ... in exchange for keeping us safe from terror. Over the next 15 years, billions of people agreed to a tacit deal where Facebook or Google were permitted to learn a staggering amount about them. But the challenge presented by Covid-19 - and the urgent need to trace contacts and movements - is of another scale of intimacy. South Korea located over 10,000 cellphones near the latest outbreak and texted them. The UK government has toyed with a centralized database of movements and health records, secured by government cyber-spies, able potentially to see who has been sick and who they have been near. Russia and many others have issued QR codes. China is putting surveillance cameras right outside people's doors. Will we look back at 2020 as the moment privacy finally evaporated?