Swine flu: Can science save us from the second wave?

 作者:屠帅衣     |      日期:2019-03-01 06:02:04
By Debora MacKenzie Read more: Special report on swine flu IS THE world ready for a killer, autumn wave of swine flu? Infections may be winding down in Mexico and causing fewer deaths worldwide than feared, but what is now keeping health officials awake at night is the possibility that a more virulent version will come roaring back and kill millions. Flu pandemics historically come in waves, often getting worse as they go. The deadly one of 1918, which was also the last H1N1 pandemic, did just that. “So did pandemics in 1890, 1847, 1781 and others,