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Artificial intelligence became millions' new pocket clinic. A powerful ally — and a dangerous one when mistaken for a doctor.

The sensor that saves diabetics' lives became a trend among curious healthy people. An interesting tool — with a hefty dose of exaggeration.

A drop of blood tells a story you can't feel. Knowing which chapters to ask for makes your check-up far more useful.

It's not about the heart beating fast or slow. It's about the variation between one beat and the next — and it tells secrets about your recovery.

The gadget on your wrist is a powerful ally — as long as you know what it truly measures and what it merely guesses.