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Saving grace

Saving grace

作者:张稗  时间:2019-03-07 03:03:07  人气:

By Phil Cohen in Seattle GIVING the immune system a broad education helps it cope with invaders that change their appearance, the meeting heard last week. Mutating viruses are a major headache for vaccine designers, partly because of a phenomenon known as “original antigenic sin”. Immunisation against one strain of a virus—the “original sin”—may inhibit the immune response to a different strain, just as Adam’s bite of the apple supposedly had consequences for us all. “In these cases no vaccine might actually be better than the wrong one,” says David Anderson of the University of California,