JAKARTA, Indonesia, May 18 -- An international team of health investigators arrived on the Indonesian island of Sumatra on Thursday to determine whether an unusually large cluster of human bird flu cases indicates that the highly lethal virus has mutated into a form easily spread among people. -
WHO Probes Bird Flu Cluster
JAKARTA, Indonesia, May 18 -- An international team of health investigators arrived on the Indonesian island of Sumatra on Thursday to determine whether an unusually large cluster of human bird flu cases indicates that the highly lethal virus has mutated into a form easily spread among people.-
By Alan Sipress