Regarding Listeriosis and cabbage leaves, we can minimize the potential of the very small risk by first removing the outter leaves, washing the cabbage, and microwaving until soft. IMNSHO, this is not necessary if you do what I do and keep a year round supply in your garden (one of the few vegies that lives through winter here in Oregon). If you are interested in classic public health case tracing, there's an old book called ELEVEN BLUE MEN that is fascinating. : )Chris Hafner-Eaton, PhD, MPH, CHES, IBCLC email: [log in to unmask] : ) : )HSR & Health Educational Consultant voice/fax: 541 753 7340 : ) : )------------**CHANGE THE WORLD, NURTURE A CHILD!**------------------ : )