Because it's all been [mostly] fear-mongering nonsense.

Study Confirms Low Mortality for Swine Flu - ABC News:

"One of the most systematic looks yet at the swine flu pandemic confirms that it is at worst only a little more serious than an average flu season and could well be a good deal milder, researchers said on Monday."

Flu pandemic could be mildest on record - washingtonpost.com:

"With the second wave of H1N1 infections having crested in the United States, leading epidemiologists are predicting that the pandemic could end up ranking as the mildest since modern medicine began documenting influenza outbreaks."