Experts meeting last month at the World Health Organization (WHO) reported “encouraging progress” in efforts to develop pandemic influenza vaccines to protect against H5N1 avian influenza virus and other bird flu viruses (http://www.who.int/hiv/mediacentre/news/65/en/).
Sixteen manufacturers from 10 countries are developing prototype vaccines against H5N1 avian influenza virus; five of these companies are also working to develop vaccines against other strains. More than 40 clinical trials, mostly in healthy adults, are under way or have been completed.
Stephenson J. Bird Flu Vaccines. JAMA. 2007;297(11):1182. doi:10.1001/jama.297.11.1182-a