21.   Parnevik won last weekend despite fighting a virus, but he has felt stronger at Pebble Beach.

22.   So far, state and industry officials said they had not been able to estimate the economic cost of fighting the virus.

23.   Some studies have shown that the new drugs are very powerful in fighting the virus.

24.   Brazilian health authorities said the best way to fight viruses is by preventive medicine.

25.   Goran Ivanisevic, the defending champion, had more problems fighting a virus than battling his opponent, Mikael Tillstrom, also an alternate.

26.   Johns contracted the disease late last year, and has had trouble recently fighting the virus that triggers this form of arthritis, the band said.

27.   Soldiers prepare to shoot pigs to fight encephalitis virus.

28.   That suggests that cocaine increases the efficiency of HIV in destroying the type of immune cell that fights the virus.

29.   The drug is ddI, often used in the multi-drug cocktails that AIDS patients take to fight the virus.

30.   Then the body appears to go back to normal, but it has never stopped fighting the virus.