The Comment article 'Stop the privatization of health data' (J. T. Wilbanks & E. J. Topol Nature 535, 345–348; 2016 ) wrongly stated that the Enlite device sends insulin into the blood when it detects a drop in glucose; in fact, it stops a pump releasing insulin. And 23andMe's latest fundraising round was US$115 million, not $150 million.