Hello and welcome to the Intelligence from the Economist.

I'm your host, Jason Palmer.

Every weekday we provide a fresh perspective on the events shaping your world.

Apple just hit a $3 trillion valuation.

It brings in more money in a month than Netflix does all year.

So why is it in the cutthroat television and movie business?

More media editor explains why it's a worthwhile side hustle for a hardware behemoth.

And some diseases seem like relics of the past.

Smallpox is gone and polio nearly so.

But one old-timey disease is raging back to prominence, particularly in Britain.

Cifalus.

Our correspondent says its resurgence is bad news, but for good reasons.

But first, the world has already known several guys of Elizabeth Holmes.

She was a precocious inventor when she founded Theranos at 19, a startup that promised an

array of quick diagnostic tests on just a few drops of blood.

Ten years later, the company was worth billions.

As the sharply dressed, hard-charging, articulate founder, she was a media darling, setting

an example in a male-dominated sector.

It's our actions that will determine this new stereotype around women being the best

in science and technology and engineering, and it's that that our little girls will see

when they start to think about who do they want to be when they grow up.

But the company's technology was more promised than substance, a lot more.

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