Sweden's Lund University has launched an app intended to map the spread of the coronavirus across Sweden, a localised version of the JoinZOE COVID Symptom Tracker app pioneered in the UK, which the researchers believe could be coupled with seroprovalence testing in order to develop an accurate map of the the virus's spread. However, the Public Health Agency is sceptical about how useful the data will be, on the basis that it has its own data. The agency has halted work on on a digital tool that…