If the birthing parent's test is preliminary positive, should we also test the baby?

No. There should be only one rapid HIV test on the birth parent/newborn pair. If the birth parent declines HIV testing or is missed for HIV testing when pregnant and/or delivering, the newborn must be tested (by law in Illinois). If the newborn’s test is preliminary positive, it means that maternal antibodies to HIV may have been detected in the newborn’s blood. Therefore, it is not necessary to also rapid test the birth parent if the newborn has been tested. A sample may be drawn from the birth parent for confirmatory HIV testing if the newborn's rapid test is preliminary positive.