According to the British, the flowchart document, page 61 of progress report #8of the U.S. Special Virus program is worth no more than toilet paper. www.boydgraves.com/flowchart
According to the British, only they can explain how visna disease appears in HIV. It does not matter the conclusions of ANYONE or ANYTHING here in the United States. For example, we provide for the British, a citation: PROC NAS VOL 83, pp. 4007 - 4011, June, 1986.
The elitist British answer only with scorn.