Partial article--I am not pay subscribed.  If you subscribe, please forward
it to me.
Interesting fact of the fostered mice not developing breast
cancer--speculating it came from
the milk they did not get.
Judy Ritchie 

http://www.newscientist.com/channel/health/mg19426061.400?DCMP=NLC-nletter&n
sref=mg19426061.400

http://tinyurl.com/3yep4j

Article Preview
Is a virus causing breast cancer?
30 May 2007 
Dan Jones 
Magazine issue 2606 
IT DID not make sense. Back in the 1930s, biologist John Bittner was
studying a strain of mice in which breast cancer ran in the family. This
suggested the cause was genetic - and yet if the pups were taken away from
their mothers at birth and fostered by other females, they did not develop
the disease. 

The answer, Bittner soon realised, was that something in the milk of the
cancer-prone mice must be causing the tumours. Over the following years it
was shown to be a virus, called the mouse mammary tumour virus or MMTV. Its
discovery raised an obvious question: might a similar virus cause breast
cancer in people, too?

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