Experts: New Bird flu vaccine looks promising

In this June 5, 2008 file photo, chickens look out of their pen in a downtown neighborhood in Jakarta, Indonesia. The first experimental bird flu vaccine made from lab-grown cells instead of chicken eggs shows promise in blocking the highly lethal virus, scientists report. Results of mid-stage testing of the Baxter vaccine, Celvapan, showed two shots produced an immune response considered strong enough to protect 76 percent of healthy adults from both the H5N1 Vietnam strain it targets and the related Hong Kong strain; it appeared to protect 45 percent from a third, Indonesian strain. (AP Photo/Irwin Fedriansyiah, File)

(AP) -- The first experimental bird flu vaccine made from lab-grown cells instead of chicken eggs shows promise in blocking the highly lethal virus, scientists report.