21.   He took antibiotics to fight the infection.

22.   In general, the disease is seen only in severely debilitated patients whose ability to fight infections has been severely compromised.

23.   It helps regulate blood pressure, energy production, the ability to fight infections and respond to stress.

24.   It fights infections, regulates blood pressure and governs the flow of blood to different organs.

25.   It is implanted directly into the eye, where it slowly releases ganciclovir to fight the infection.

26.   It is used to fight infections in AIDS patients.

27.   It is remotely possible that you have a problem fighting certain infections.

28.   Lungs are so filled with fluid to fight infection that they stiffen.

29.   Millions of unsuspecting computer users are vulnerable to software viruses, and most of them have no idea how to fight an infection.

30.   Most existing drugs have been developed by taking chemical compounds and testing them until the right ones are found to fight infection, reduce inflammation or halt disease.