There are cows in over 80% of U.S. Dairy farms that have been testing positive for the Bovine Leukemia Virus, and they are doing almost nothing about it except rolling in the profits $$$$$ and probably laughing at us for eating their disease infected cattle.
www.aphis.usda.gov/animal_health/nahms/dairy/downloads/dairy07/Dairy07_is_BLV.pdf
They have known about this since 1969!
In Europe they eradicated their BLV infected cows by culling them, they lost a lot of money, but now their meat and dairy products are BLV free, but in America they just agreed to clean their instruments better and the virus has only been growing!
Leukemia is the most common cancer in children :'( and in 2015 it was present in 2.3 million people and caused 353,500 deaths!
Only about 5% of the cows who get the Leukemia virus show obvious symptoms and they are removed from production, that means most of the infected animals are still being used for beef and dairy products like milk and hamburgers!
www.ncbi.nlm.nih.gov/pubmed/14709247
Bovine leukemia virus (BLV) is an oncogenic retrovirus that commonly infects cattle and causes B cell leukosis in 1-5% of infected cattle. BLV-infected cells are present in marketed beef and dairy products. We detected at least one antibody isotype reactive with BLV in 74% of the human sera tested.
According to this study nearly 80% of humans are testing positive for antibodies for the Bovine Leukemia Virus, this does not mean that they have the Leukemia virus, it means that their body is fighting off the foreign Leukemia infected cells because they are eating products coming from infected cows. It appears it is being passed down through the DNA.
According to a small-scale survey study conducted in 1997, approximately 40% of beef cattle responding operations tested positive for BLV infection. According to data from the same study mentioned before, 60% of farms and ranches in our area potentially have infected cattle and approximately 20% of individual cows are affected.
beef.ces.ncsu.edu/bovine-leukosis-virus/