A deadly outbreak of a new kind of bird flu has now sickened 16 people in China and killed six, but U.S. health officials on Friday cautioned that there’s no cause for widespread alarm. The new influenza A H7N9 virus has not been seen before in humans, but it doesn’t appear to be transmitted easily among people, and there have been no cases detected in the United States, said Dr. Tom Frieden, the director of the Centers for Disease Control and Prevention. “There are no specific steps people in this country can take. People can go about their daily lives,” he said. Still, he said CDC officials are in close contact with Chinese authorities as they track the spread of the novel virus, which has been found in people from four Chinese provinces.  Victims have included 15 adults and a 4-year-old child, all of whom appeared to have clear ties