Contagious cancer found in clams
Third example of transmissible malignancy poses no threat to people
![Soft-shell clams](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/04/ti_clamcancer_feat_free.jpg?fit=860%2C460&ssl=1)
CLAMTASTROPHE Soft-shell clams (Mya arenaria) can get a contagious form of leukemia when cancer cells migrate from one clam to another, a new study shows. The clam disease poses no risk to humans.
Michael J. Metzger