Mr. Bloomberg and Dr. Frieden urged people to stay calm, taking precautions like washing their hands frequently, but said there was no need to stock up on drugs like Tamiflu.

• 彭博先生博士弗里登呼吁市民保持冷静，采取预防措施喜欢经常洗手，但他表示，没有必要囤积药物如达菲。