Morrissey has been hospitalised in San Francisco after developing pneumonia on both his lungs.
A statement from Morrissey's representative, published on ContactMusic reads: "Morrissey is presently being treated in San Francisco for 'double pneumonia', but remains on course to headline the Vive Latino festival in Mexico City on March 14."
On Saturday, the former The Smiths star's official Facebook page read: "Due to Morrissey's medical condition, tonight's engagement at the Regency Ballroom in San Francisco will need to be rescheduled and will now take place on May 1. All tickets previously purchased for the Regency Ballroom show will be honored on the new date."
The British singer first cancelled concerts in February, citing a bleeding ulcer and Barrett's esophagus as the reason for his cancellation. "Morrissey thanks everyone concerned for their well wishes during this time and hopes for a speedy recovery," a rep for Morrissey said at this point.
While he intended to resume his tour in El Paso on 12 February, that show was cancelled and he announced that the tour would return on 21 February in Denver. That show was cancelled as well.
At the beginning of March the outspoken 53-year-old added another icon to his list of enemies: David Bowie.
Bowie famously refused to be included in the art for a repress of Morrissey's 1989 single, 'The Last of the Famous International Playboys'. Morrissey wanted to use a previously unseen photo of Bowie on the 8 April re-issue of the 'Bona Drag' track, but news broke last month of Bowie's disapproval of that idea.
Morrissey has now elected to use a photo of 'Never Gonna Give You Up' singer Rick Astley instead, effectively 'Rickrolling' Bowie.