Callaghan: Health care isn't about tech – it's about humans

Amazon and two partners recently announced a major, if mysterious, move into the American health-care market. In all likelihood, this endeavour will prove quite profitable, touched as it is by the profit-turning pixie dust of Silicon Valley, and fuelled by mountains of capital, talent and data.
And yet, if the goal is truly to improve public health, the tech giants have already missed the point.
For this non-profit venture, Amazon has joined forces with the bank JP Morgan, and with Warren B