image: Reuters (click)

At my request, the board of directors has granted me a medical leave of absence so I can focus on my health. I will continue as CEO and be involved in major strategic decisions for the company.
— Apple CEO Steve Jobs 17/1/11

Full statement at apple.com

All I can say is I wish him and his family well.

(It’s galling the way some people focus on the stock price. It will take care of itself.)