Swine flu epidemic is raising fear all over the world.
US health officials say up to 40 percent of Americans could get swine flu this year and next and several hundred thousand could die without a successful vaccine campaign and other measures. Similar forecasts and TV commercials are aired all over the world, though with different degrees of anxiety.
The estimates by the Centers for Disease Control and Prevention are roughly twice the number of those who catch flu in a normal season and add greater weight to hurried efforts to get a new vaccine ready for the fall flu season.
Swine flu has already hit the United States harder than any other nation, but it has struck something of a glancing blow that's more surprising than devastating. The virus has killed about 300 Americans and experts believe it has sickened more than 1 million, comparable to a seasonal flu with the weird ability to keep spreading in the summer.
Health officials say flu cases may explode in the fall, when schools open and become germ factories, and the new estimates dramatize the need to have vaccines and other measures in place.
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