Machine generated contents note: ch. 1 Influenza: Virus and History -- ch. 2 The Forgotten Pandemic Remembered -- ch. 3 Breakthroughs -- ch. 4 Setbacks -- ch. 5 The Forecast Calls for Pandemics -- ch.

Flu strikes every winter, but something seems to be different this year. A seasonal flu virus suddenly mutated in the summer; it appears to evade some of our immunity; has kick-started a flu season ...