1.   One of the best natural examples of this is the ability of the flu virus to keep cropping up in new forms.

2.   They are trying to stop the spread of the flu virus.

3.   He had a bad dose of the flu virus that was going around.

4.   There are many different strains of flu virus.

5.   Mansfield Town Caretaker Manager Bill Bearden has given his whole squad the day off to try to stop the spread of the flu virus.

6.   Medical experts are surprised at the speed at which the latest flu virus has caught on in Scotland.

7.   The dregs of a flu virus resulted in the usual effervescence of soprano Lorna Anderson, being clouded over.

8.   The flu virus varies in its structure and it varies in its ability, in the type of antibodies it produces in people.

9.   Also, there is no evidence that the flu virus can become resistant to them and there are no known interactions with other drugs.

10.   As a precaution in working with the bird flu virus, Dr. Subbarao and others take a drug, rimantidine, to prevent attacks of influenza.