Text 2 No wonder they are called"patients".When people enter the health-care systems of rich countries today,they know what they will get:prodding doctors,endless tests,rising costs and,above all,long waits.Some stoicism will always be needed,because health care is complex and diligence matters.But frustration is boiling over.This week three of the biggest names in American business-Amazon,Berkshire Hathaway and JPMorgan Chase-announced a new venture to provide better,cheaper health care for their employees.A fundamental problem with today"s system is that patients lack knowledge and control.Access to data can bestow both.The intemet already enables patients to seek online consultations when and where it suits them.Yet radical change demands a shift in emphasis,from providers to patients and from doctors to data.That shift is happening.Technologies such as the smartphone allow people to monitor their own health.The possibilities multiply when you add the crucial missing ingredients-access to your own medical records and the ability easily to share information with those you trust.That allows you to reduce inefficiencies in your own treatment and also to provide data to help train medical algorithms.As with all new technologies,pitfalls accompany the promise.Hucksters will launch apps that do not work.But with regulators demanding oversight of apps that present risks to patients,users will harm only their wallets.Not everyone will want to take active control of their own health care;plenty will want the professionals to manage everything.The benefits of new technologies often flow disproportionately to the rich.Those fears are mitigated by the incentives that employers,govemments and insurers have to invest in cost-efficient preventive care for all.Other risks are harder to deal with.Greater transparency may encourage the hale and hearty not to take out health insurance.They may even make it harder for the unwell to find cover.Will the benefits ofmaking data more widely available outweigh such risks?The signs are that they will.Plenty of countries are now opening up their medical records,but few have gone as far as Sweden.It aims to give all its citizens electronic access to their medical records by 2020;over a third of Swedes have already set up accounts.Studies show that patients with such access have a better understanding of their illnesses,and that their treatment is more successful.Trials in America and Canada have produced not just happier patients but lower costs,as clinicians fielded fewer inquiries.That should be no surprise.No one has a greater interest in your health than you do.Trust in Doctor You. Ineffective applications would make users