Trial Starts for Bird Flu Vaccine Against a Possible Pandemic Strain

Scientists have started a new vaccine trial. The vaccine targets a bird flu virus called H5N1. Birds have been getting sick from this virus in many countries. Some people also became ill, but the virus has not spread easily from person to person. Doctors hope the shot can help the body prepare. If H5N1 ever changes and spreads between humans, this vaccine could be ready to protect people faster. The trial will test safety and how well the vaccine works.