21.   Though the virus does not affect humans, it is fatal to dogs, cats and other domestic animals.

22.   WHO also urged each country to conduct scientific studies to determine more accurately how often Creutzfeldt-Jakob disease affects humans.

23.   A strain of the virus, which does not affect humans, has been confirmed in harbor seal carcasses tested in Denmark and neighboring Sweden.

24.   Bird flu does not usually affect humans.

25.   Foot-and-mouth disease is a highly contagious disease that causes wasting in animals but does not affect humans.

26.   Foot-and-mouth disease does not affect humans but has led to the destruction of thousands of cattle and sheep in Europe.

27.   If Mad Cow disease does not affect humans, most other effects will prove temporary, the FAO said.

28.   Mad cow disease has been linked to a variant strand of Creutzfeldt-Jakob disease, which affects humans.

29.   Old World screwworm also affects humans.

30.   Nobody really knows how lower doses delivered over decades will affect humans.