But the medical records of 1, 700 patients who died at the hospital in the last seven years are now being studied and more than 20 were now deemed suspicious, Dr Mario Lobato - the chief investigator assigned by Brazil's health ministry - told Globo.

BBC: Brazil studies Curitiba doctor's link to 300 deaths

Dr. Mario was in Chinatown at the corner of Walker Street and Cortlandt Alley.

CNN: Apparently This Matters: Paging Dr. Mario

Without Dr. Mario, I wouldn't have ventured off into this particular part of town.

CNN: Apparently This Matters: Paging Dr. Mario

But finding Dr. Mario was a good excuse for an urban adventure in New York.

CNN: Apparently This Matters: Paging Dr. Mario

Dr. Mario Raviglione heads the World Health Organization's "Stop TB" program.

NPR: Man Eluded Attempts to Control Deadly TB Strain

And this was Dr. Mario throwing a vitamin.

CNN: Apparently This Matters: Paging Dr. Mario