Death on the wing. The director of the Australian Animal Health Laboratory says the frequency of animal-borne diseases is growing. He singles out China as a giant "cooking pot" for exotic new viruses to jump species, with the world's biggest concentration of humans mingling more with exotic wildlife and intensive livestock. [News Source]

Studies show one dose of H1N1 vaccine may be enough. Two studies published on Thursday confirmed that a single dose of swine flu vaccine can protect people from the new pandemic H1N1 virus -- welcome news to global health officials who had worried that people might need two doses. [News Source]