US Health Officials: How to Survive a Flu Pandemic - Science News - Playfuls.com - Science & Technology

US Health Officials: How to Survive a Flu Pandemic - Science News - Playfuls.com - Science & Technology: "Case fatality ratio is the fraction of ill people who die. In the epochal 'Spanish influenza' of 1918, which killed at least 50 million people worldwide, the ratio in the United States was about 2.2 percent. Without a good mitigation strategy, a 1918-type pandemic today would kill 1.8 million Americans. It would be a Category 5, the most serious. "