Gadzira shanduro yakaoma zvikuru yemutsara uyu Billy akaberekwa aine chirwere chemwoyo tetralogy of Fallot (TOF), icho chakatanga kuonekwa nomukoti paakanga ava nemaawa matatu okuberekwa.
Zvechokwadi, shanduro yakaoma zvikuru yemutsara wacho ndeiyi "Billy akaberekwa aine chirwere chemwoyo tetralogy of Fallot (TOF), icho chichada kuti aite kuvhiyiwa kwemwoyo katatu muupenyu hwake, chimwe chazvo chakaitwa paakanga ava nemazuva matatu okuberekwa".