This is not new stuff. They should look at what's being done with cattle to prevent the transmission to calves? I don't have the energy to research it but I had never heard of BLV before.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1829189/
http://www.liebertonline.com/doi/abs/10.1089/088922203771881202
Also about sheep and other livestock. http://www.forums.aboutmecfs.org/showthread.php?7554-Retroviruses-in-Sheep!-fascinating-snippet-...
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1829189/
http://www.liebertonline.com/doi/abs/10.1089/088922203771881202
Also about sheep and other livestock. http://www.forums.aboutmecfs.org/showthread.php?7554-Retroviruses-in-Sheep!-fascinating-snippet-...