Sent_en: 2zh Some flu viruses in the United States and Canada have shown increased levels of resistance to the antiviral drug Tamiflu (oseltamivir), the World Health Organization (WHO) said on Friday.
Sent_yy: 周五，世界卫生组织（WHO）表示，美国和加拿大的一些流感病毒对抗病毒药物达菲（奥司他韦）的耐药性增加。