" H7" and " N9" refer to particular types of two proteins, haemagglutinin and neuraminidase, that help influenza viruses invade host cells.

“H7”“N9”是指两种蛋白质，血凝素神经氨酸苷酶，这两种成使得流感病毒可以入侵宿主身体胞。

Mutations cause minute changes in the hemagglutinin, H, and neuraminidase, N, antigens on the virus's surface.

变导致病毒表面血凝素（H）神经氨酸酶（N）抗原发生微小变化。

And type A's can be divided into further sub-categories, depending on the subtypes of two proteins present on their surface: hemagglutinin, 'H', and neuraminidase, 'N'.

A型流感病毒还可以进一，取决于其表面存在的两种蛋白质的亚型：血凝素(H)神经氨酸苷酶(N)。

Antibodies for the flu are primarily directed against the two proteins on the surface of the influenza virus, hemagglutinin (H) and neuraminidase (N).

流感抗体主要针对流感病毒表面的两种蛋白质，血凝素（H）神经氨酸酶（N）。

Sold under the names Tamiflu and Rolenza, these drugs have been said to work by blocking the protein neuraminidase that viruses use to escape their host cells.

这些药物以 Tamiflu Rolenza 的名称出售，据说通过阻断病毒用来逃逸宿主胞的蛋白质神经氨酸酶起作用。