Update, Feb. 22: Yesterday, Morrissey's official position on the Feb. 24 S.F. show was that it was being “postponed” and would be rescheduled soon. Today, it's simply canceled, per a notice from show promoter Another Planet Entertainment:
The Morrissey concert scheduled for February 24 at Davies Symphony Hall has been canceled as Morrissey is currently undergoing treatment for a bleeding ulcer and Barrett's esophagus. Due to venue availability, all parties concerned will be unable to reschedule this engagement. Refunds are available at the original place of purchase. Morrissey thanks everyone concerned for his well wishes and looks forward to getting back on the road.