Two to four times a week, Stemp spent four hours hooked to an IV that transfused a chelating chemical.

FORBES: Magazine Article

Soon after birth, special cells were collected from their new son's umbilical cord and last month, transfused into his sister to help restore her damaged system.

ECONOMIST: Gene genies

The possibility that such mistakes are common will be cold comfort to the girl who lost a critical reproductive part, or to the family of the woman who died after being mistakenly transfused with oxygen.

CNN: Tiny Margin for Error