21.   But state DEP Commissioner Arthur Rocque Jr. said spraying is not likely to prevent the virus from appearing here.

22.   Chinese scientists have developed drugs that can help prevent fatal viruses that periodically decimate shrimp farms, the state-run Xinhua News Agency said Saturday.

23.   China said Thursday police will tighten control over computer software makers and hackers to prevent viruses from damaging computer networks.

24.   It is designed to control HIV infection by generating a type of protein that may be able to prevent the virus from attaching to immune cells.

25.   Microsoft also advised customers to take precautions to prevent viruses from being transmitted by e-mail.

26.   Microsoft also advised customers to set security levels to prevent viruses from being transmitted by e-mail in case the fraudulent program was opened.

27.   Now researchers have seen a similar outcome with an experimental vaccine that tries to stimulate immune cells to prevent the virus from multiplying.

28.   She will examine blood samples from the herbal-treated patients to find out whether the herbs somehow prevent the virus from replicating.

29.   The center has isolated the infected residents, while suspending admission of new residents to prevent the virus from spreading further, Kyodo said.

30.   The vaccine is designed to control HIV infection by generating a type of protein that may be able to prevent the virus from attaching to immune cells.