There are growing tensions over the best approach to coronavirus contact-tracing apps and whether or not the technology can live up to its promise.
Smartphone software is being developed to alert users when someone they were recently near becomes infected.
But the Ada Lovelace Institute has said there is “an absence of evidence” such tools are practical, accurate or technically capable.
Others stress the initiative must be backed up by an army of human checkers.
To further complicate matters, a schism has emerged among technologists working together to develop a pan-Europe solution.
And hundreds of scientists and researchers have signed a statement warning “mission creep” could eventually lead to “unprecedented surveillance of society at large”.
What are the concerns?
Contact-tracing apps try to log every instance a person is close to another