Sent_en: 2zh Homeland Security Secretary Janet Napolitano announced today at a news conference that the U.S. has declared a public health emergency in light of the swine flu outbreak.
Sent_yy: 国土安全部长珍妮特·纳波利塔诺今天在一次新闻发布会上宣布，鉴于猪流感爆发，美国已宣布进入公共卫生紧急状态。