21.   For years, computer viruses spread mainly by people physically exchanging infected diskettes.

22.   Fueled by similar confusing news reports, it spread by word of mouth.

23.   Golden bamboo is a running type, which means it spreads by sending out invasive runners similar to those of Bermuda grass.

24.   He became one of those playground figures whose reputation spreads by word of mouth.

25.   His business has spread by word of mouth since then, Davis said.

26.   Hycamtin works inside a cell, stopping the cancer from spreading by interrupting the replication of DNA.

27.   If the message seeps in that AIDS does not spread by a transmittable virus, people may ignore admonitions to make sex safe.

28.   In contrast viruses spread by hitchhiking by attaching to documents, programs or disks.

29.   INACTION, BAD POLICY ALLOWS TUBERCULOSIS TO SPREAD By Michael McCarthy.

30.   Influenza is spread mainly by airborne transmission or contact with oral secretions, said Dr. Jonathan E. Fielding, county director of public health.