It appears that NHAPI VXU_V04 (Unsolicited Vaccination Record Update) class is missing support for the RXA segment (Pharmacy/Treatment Administration) for 2.5.1 version of HL7.
Am I somehow choosing the wrong class for VXU?
VXU_V04 vxu = new VXU_V04();
vxu.MSH - works
vxu.PID - works
no vxu.RXA???
Gina