H1N1 cases starting to dwindle(减少), even as Tamiflu-resistant cluster detected
updated 7:37 p.m. ET Nov. 20, 2009
The pandemic of swine flu may be hitting a peak in the Northern Hemisphere(北半球), global health officials said on Friday, but they cautioned it was far from over.
Officials also said they were investigating several troubling outbreaks of drug-resistant H1N1 but noted they were limited so far and that there were no indications yet the virus was mutating(变异) in a sustained way.
The World Health Organization said H1N1 flu was moving eastward across Europe and Asia after appearing to peak in parts of Western Europe and the United States.