A race is on to produce perfectly pure blood, just in time for the next big AIDS scare. Aids has killed 22 million people worldwide, and another 36 million are infected with HIV, the virus that causes the dread disease. Yet the potential looms for the appearance of an even hardier new virus as dangerous as HIV. "It's been the feeling that there will be another virus. Nature is very clever that way," says Rebecca Haley, the Red Cross' chief medical officer.
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