Treating flu-stricken children with anti-viral medication including Tamiflu and Relenza could do more harm than good, a new report has warned. Researchers from the University of Oxford found that while the anti-virals reduced the duration of illness by up to one day and a half, they had “little or no effect” on the likelihood of the children developing complications. The researchers conceded that they didn’t know the extent to which their report applied to the current swine flu pandemic, but said, “based on current evidence, the effects of anti-virals on reducing the course of illness or preventing complications might be limited.” In compiling their report, published in the British Medical Journal, the Oxford University researchers searched the world for trials of Tamiflu and Relenza on children under 12.