The spread of an avian flu virus in cattle has again brought public health attention to the potential for a global pandemic. Fighting it would depend, for now, on 1940s technology that makes vaccines from hens' eggs.
More work is needed to ensure everyone can access pandemic flu vaccines when we need them, say Nicole Lurie and Freya Hopper at the Coalition for Epidemic Preparedness Innovations (CEPI).
There might be stockpiles, but making an effective bird flu vaccine won t be quick or easy aol.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from aol.co.uk Daily Mail and Mail on Sunday newspapers.
While H5N1 bird flu doesn’t appear to pose an imminent threat to humans, structures are already in place to make vaccines against it as a precaution.