This was because the pandemic virus spread faster than would be expected if there were widespread immunity to it, and because antibodies to the seasonal vaccine do not cross-react with it.
这是因为大流行病毒比预料传播更为迅速，即使对它有普遍免疫性，季节疫苗的抗体与它也没有交叉作用。
2
Another spread out over his coat the cross-belt and cartridge-box of a National Guardsman, the cover of the cartridge-box being ornamented with this inscription in red worsted: Public Order.
In the prevention, it is important to avoid cross infection between husband and wife, as well as the spread of indirect goods and mother to child transmission.