But a state with two excellent universities has that - not two flagships. Flagship is a singular term - a good reference for the word generally can be found here. In this context, flagship means, as the introduction says, the leading comprehensive public research university in a given U.S. state.
During any pregnancy a small amount of the baby's blood can enter the mother's circulation. If the mother is Rh negative and the baby is Rh positive, the mother produces antibodies (including IgG) against the Rhesus D antigen on her baby's red blood cells.
If the mother is Rh negative and unsensitized then she receives RhoGAM if she has an Rh positive fetus, but she does not receive it if the infant is negative. She might have received antibodies as a fetus from her own mother if her mother was Rh positive, so she might already be sensitized before becoming pregnant herself.