(CNN) -- A photo released by the White House on Friday shows Apple CEO Steve Jobs, along with other tech luminaries, raising a toast with President Barack Obama at a dinner Thursday night in San Francisco.
The photo, of a private dinner during the President's visit to California, comes as tabloid reports, some featuring alleged photos of Jobs, have questioned the Apple leader's health.
In the photo, Jobs and Facebook CEO Mark Zuckerberg flank Obama during the toast. Wearing his trademark black mock turtleneck shirt, Jobs is photographed from behind.
Jobs was diagnosed with cancer in 2003. He took a six-month leave of absence in 2009, during which he was reported to have had a liver transplant.
He began an indefinite medical leave of absence on January 17.
This week, a supermarket tabloid and a gossip website ran unconfirmed reports suggesting that his health was declining.
Neither Apple nor Jobs, or anyone directly familiar with his health care, have commented publicly on the reason for his leave or the most recent rumors.
Jobs had kept a low profile since unveiling a new line of MacBook laptops in October.
Obama's meeting with the tech luminaries was intended to discuss innovation and spurring job growth.
Also worth noting: Zuckerberg appears to have shed his go-to hooded sweatshirt look for his dinner with the leader of the free world.
Others attending the dinner included Google CEO Eric Schmidt, Yahoo! CEO Carol Bartz, Twitter CEO Dick Costolo, Cisco Systems CEO John Chambers, Oracle CEO Larry Ellison and Netflix CEO Reed Hastings.
Also, Stanford University President John Hennessy, Genentech CEO Art Levinson, Steve Westly, founder of The Westly Group and John Doerr, a partner at Kleiner Perkins Caufield & Byers