Experts Urge Action as U.S. Lines Up for Flu Shots  WASHINGTON (Reuters) - Concerned health officials began  investigating what went wrong at a British vaccine plant where  half the U.S. flu shots were made, while Americans jostled for  now-scarce immunizations on Friday. 

Which of the following sections of a newspaper would this article likely appear in? World News, Sports, Business, or Science and Technology? 