Journalists are not immune to the start-up fever that they have been reporting. Three of them have left different editions of the Economic Times in recent weeks to start digital companies. That includes the principal correspondent and the technology editor at the Bangalore ET who are partnering another person to launch one. They plan to stay in stealth mode for a few months until they are ready. And a third journalist, at the Delhi edition of ET has followed suit after a long stint at the paper, also to launch his own start up.