MELBOURNE, Australia--(BUSINESS WIRE)--CSL Limited, Australia’s leading biopharmaceutical company, announced the Journal of the American Medical Association (JAMA) has published data from a clinical trial conducted in Australia to study CSL’s pandemic H1N1 2009 ‘swine’ flu vaccine. Results of the trial demonstrate a robust immune response after a single dose in children as young as 6 months of age, which is further enhanced by the administration of a second dose given three weeks later.