virus可数吗

virus可数，复数是viruses

This means scientists cannot monitor the virus 's evolution .

这意味着科学家不能监测病毒的进化。

Then , with their typical generosity , they give the virus to humans .

随后，蚊子用它们典型的传染方式将病毒感染到人类身上。

Later virus and malaria will be added .

之后病毒和疟疾会被加入。

And the virus might spread globally .

而且这一病毒也许会在全球蔓延。