Even recently we have seen the "West Nile Virus" go from something we only read about to something that has grown nearer to our own home town
One very relevant reason is when disease is found to be contracted and spread through transfusions it only serves as a strong validation for certain doctrines that do not exist is most other religions.
The West Nile Virus is confirmed to have been transferred through blood transfusions and organ transplants. I was listening to a report on it last night and it has been estimated that there could be as much as 1/2 the blood supply infected with the West Nile Virus and there is no way to determine which are infected and which are not because there is no test yet to reveal the virus until a person has been infected. They came to this conclusion because most of the people who have been infected with the virus have recently had either blood transfusions or organ transplants. This also explains how the virus was spreading to places that had no mosquito problem or the patients had no evidence of being bitten. The one thing they have in common was transplants and transfusions.
You have to realize how this news will be received by the WT and displayed.