virulent virus造句怎么写

The results showed that the fusion protein can yield antibodies with high neutralizing activity as well as provide protection against challenge with virulent virus.

When tested with virulent virus, the test showed a positive result.

The test gave consistently positive results with virulent virus.

The virus was proved to be a Duck Plague virus by means of cell culture, neutralization test and PCR assay, and it was maybe a virulent virus.