disease

Washington — For the second time this year, the federal government has failed to stop a man infected with a dangerous strain of tuberculosis from traveling in and out of the United States. U.S. officials last spring were unable to catch a Mexican man infected with the disease because the doctor treating the man did not know his real name, according to a government official who was briefed on the incident but requested anonymity because the official was not authorized to discuss it publicly.

Scientists have created a strain of rice that carries a vaccine for cholera which would be cheaper and easier to distribute than the standard injection-based vaccine, scientists said. Cholera is a disease of the gut that is passed to humans through water or food contaminated with the bacterium Vibrio cholerae. It can kill within a few hours of infection and is highly prevalent in many of the world's poorest countries.