21.   All attempts at prophylaxis merely spread the disease, as by inoculation with an infected needle.

22.   Burning wood with oak wilt does not spread the disease.

23.   But British rendering practices may have helped spread the disease, said David Evans, president of Carolina Byproducts, a rendering company in Greensboro, N.C.

24.   But rabies is now being attacked on a broader front, by immunizing the wild animal populations that spread the disease.

25.   But the step is being proposed because of strong evidence that the disease can be spread through reprocessed animal feed contaminated with rogue proteins known as prions.

26.   But what worries the officials in Washington is the possibility that an adversary with even a small quantity could find much more effective means of spreading the disease.

27.   Colonial America found that the dislocations of war spread disease.

28.   Deer ticks feed on the blood of those animals and can spread the disease to humans they bite.

29.   Dirty hands spread disease.

30.   Diseases are spread by injections done with dirty razor blades or porcupine quills.