Outside the cluster of cinder block structures that make up Kano's Infectious Diseases Hospital, hundreds of sick children are lined up, awaiting treatment from Doctors Without Borders, the nonprofit group, which has set up a tent on hospital grounds.

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She was in her second year of working as a researcher and fellow in infectious diseases, the hospital said.

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Dr. Siedner is a postdoctoral fellow in the division of infectious diseases at Massachusetts General Hospital and Harvard Medical School.

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Researcher Dr Isaac Bogoch, who specialises in internal medicine and infectious diseases at Toronto General Hospital, told the BBC he had read about smartphone microscopes being trialled in a laboratory and decided to "recreate it in a real world setting".

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Because of the virus subtype, it is less likely that avian flu would become transmissible from person to person, but still possible, said Dr. William Short at the division of infectious diseases at Thomas Jefferson University Hospital in Philadelphia, Pennsylvania.

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Earlier last year Antonio Giorgio, and his colleagues at the Cotugno Hospital for Infectious Diseases in Naples, published a paper in the American Journal of Roentgenology describing their success in using radio waves, rather than laser light, to treat hepatocellular carcinoma, another form of liver cancer and one that is among the deadliest in the world.

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Dr. RUTH BERGGREN (Associate Professor, Adult Infectious Diseases, Tulane Medical Center and Charity Hospital): Sitting in the HIV out-patient clinic, taking care of an uninsured man who's coughing, I cannot get a smear on him to diagnose tuberculosis in the city of New Orleans.

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