The 80-year-old star cancelled several of his US tour dates and an appearance on American Idol earlier this month (Apr07) after falling ill with the virus.
Bennett's publicist Sylvia Weiner says regrettably the singer has had to postponed today's (19Apr07) and Friday's (20Apr07) gigs in Columbus and Cleveland, Ohio, respectively.
She says, "(He) was advised by his doctor to restrict plane travel and to rest for the next five days. Both concert appearances are in the process of being rescheduled.
"His condition is improving and he is expected to return to his full concert schedule."
Source: WENN