31.   The virus appeared in Hong Kong late in the afternoon, spreading throughout e-mail systems once a user opened one of the contaminated messages.

32.   The virus also appeared at the State University of New York, which administers the business center.

33.   The virus appears to have originated in Europe.

34.   This was the first time the virus had appeared in America.

35.   West Nile virus appears first as a flulike illness.

36.   When the virus first appeared in the Western Hemisphere, it felled hundreds of crows in New York, New Jersey and Connecticut.

37.   When combined with two older AIDS drugs, the virus appears to stop reproducing.

38.   WHO influenza program chief Dr Daniel Lavanchy, who was in Hong Kong at the weekend, has said the virus does not appear to be spreading quickly.

39.   When the new drugs are used alone, the virus appears to quickly grow resistant to them, just as it does with other medicines.

40.   The newly discovered hepatitis G virus appears to be benign, according to a study to be published Thursday in the New England Journal of Medicine.