The company that released contaminated flu virus material from a plant in Austria confirmed Friday that the experimental product contained live H5N1 avian flu viruses. And an official of the World Health Organization’s European operation said the body is closely monitoring the investigation into the events that took place at Baxter International’s research facility in Orth-Donau, Austria. “At this juncture we are confident in saying that public health and occupational risk is minimal at present,” medical officer Roberta Andraghetti said from Copenhagen, Denmark. “But what remains unanswered are the circumstances surrounding the incident in the Baxter facility in Orth-Donau.” The...