<sod >His death Tuesday was confirmed by chief medical officer Dr Brima Kargbo, who had hailed Dr Khan as a "national hero" when he was diagnosed with the disease last week.< eod>< sod > Dr Khan's death on Tuesday afternoon was confirmed by chief medical officer Dr Brima Kargbo, who had previously hailed him as a "national hero" when she announced he had contracted the the disease.< eod>