Infant mortality worldwide would take a nose dive if neonates could be vaccinated at birth.  But vaccine testing is problematic because of both the known risks and a newborn’s weaker immune response system.  To address this, Harvard scientists have taken umbilical cord blood, cultured its cells in collagen and added plasma from newborns—in effect creating a living environment that mimics a newborn human immune system.  They believe this will be a reliable way to test vaccines for use at birth.   MORE