The new viruses are then free to infect other cells.

In this way, only cells infected by the virus are susceptible to the drug.

One possibility is that the virus does not infect human cells directly.

It also plays a crucial role in the way viruses infect cells.

These viruses were observed to infect cells in the laboratory.

One study has suggested that the virus may be able to directly infect cells in the colon.

H1N1 can infect cells deep in the lungs, making it far more potentially dangerous than previously thought.

Often, it is these cytotoxic effects that lead to the death and decline of a cell infected by a virus.

That just shows that the virus can infect human cells, so what?

Other strains, which infect cells only at certain stages of development, produce much more limited infections.