Letter: All medical data must be kept secure

From Sam Edge, Ringwood, Hampshire, UK

In your report on the roll-out of two apps that help people monitor their health at home by UK National Health Service trusts, I didn't see any mention of data security (18 February, p 11).

Have any of these apps been independently security audited? Apart from the dangers of personal data theft, subverting them to mislead healthcare professionals could cause real harm to patients by misdiagnosis.

These apps are being used for diagnosis, so they should be formally approved under the EU medical device directives.