Health officials in Hong Kong killed about 20,000 chickens Tuesday after the deadly H7N9 bird flu virus was found in poultry imported from the mainland.
(Reuters) – Culls of hundreds of thousands of chickens, turkeys and ducks to stem bird flu outbreaks rarely make international headlines these days, but they
Researchers studying a potentially more lethal, airborne version of the bird flu virus have suspended their studies because of concerns the mutant virus they have