Definition: In this task, you are given a news article. Your task is to classify the article to one out of the four topics 'World', 'Sports', 'Business', 'Sci/Tech' if the article's main topic is relevant to the world, sports, business, and science/technology, correspondingly. If you are not sure about the topic, choose the closest option. Note that URLs in the text have been replaced with [Link].
Input: Flu Vaccine Supply Cut in Half By LAURAN NEERGAARD     WASHINGTON (AP) -- Americans' supply of flu vaccine was abruptly cut in half Tuesday, prompting the government to ask most healthy adults to delay or skip flu shots so that the elderly and others most at risk from influenza can get scarce supplies.    British regulators unexpectedly shut down a major flu-shot supplier Tuesday, prompting a record shortage in this country just as flu season is about to begin...

Sci/Tech