TORONTO — Making a vaccine to protect against the new bird flu virus that has emerged in eastern China could prove to be problematic, influenza experts acknowledged yesterday.
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"...clinical trials of vaccines made to protect against other viruses in the H7 family have shown the vaccines don't induce much of an immune response, even when people are given what would be considered very large doses."
This is a little worrying - and possibly a spur to making universal vaccines!