北爱尔兰25%的新病例是delta变体,在英国这个数字是91%
science:delta变体为何有高度传染性?诺奖得主团队有重磅发现!
it's called the delta variant for reason.
new variant 新变体87mutations 变异87the delta variant delta
二孩妈靠退烧药活命! 美日增15万 93%都是delta!
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