Smartphone mobility and social graph data that’s already being collected and analyzed. Rather than just using existing tech to target ads and build surveillance capitalism profiles, it could be used in the public interest. On an opt in basis naturally; but as frictionlessly as possible via cookie tracker popups and updates to FAANG terms of service perhaps.
Stranger things have happened in 2020 than that! It’s a win-win. Superspreader nodes either get their vaccine or they become aware of how much they’re already tracked may begin to consider the nuances and implications.