It is possible that the two viruses could mingle in one cell and from that single cell out would emerge a hybrid virus, a virus that had the characteristic of human influenza moving easily from person to person as well as the avian influenza characteristic being unrecognizable to the human immune system.  -   Richard Thompson     Quotes
It is possible that the two viruses could mingle in one cell and from that single cell out would emerge a hybrid virus, a virus that had the characteristic of human influenza moving easily from person to person as well as the avian influenza characteristic being unrecognizable to the human immune system. Richard Thompson
 Cell