During this time viral material may be passed from mother to child in the bloodstream or breastmilk.

These proved to contain the same viral material as the archive samples.

Four of the plants treated in this manner developed disease, proof that the viral genetic material in the plant had combined with the natural virus.

Secondly, the viral genetic material must be replicated many times to provide a copy for each new virus particle (E).

The viral material is then injected into the host cell's cytoplasm.

This is done to preserve any viral material that might be present during species identification.

"And you can never remove the viral genetic material."

Agriculture Department officials said no viral material escaped.

This extra program is inserted into a few random cells around the body, along with the rest of the viral genetic material.

With the soldier's lung tissue in hand, the researchers began the tedious process of trying to extract the viral genetic material.