When a postpartum client's rubella titer is found to be 1.8, what action should the nurse anticipate?

The appropriate action when a postpartum client's rubella titer is found to be 1.8 is to administer a subcutaneous rubella virus vaccine. A titer of 1.8 typically indicates that the client is not immune to rubella, as immunity is often defined by a titer of 10 or greater. Vaccination is crucial for women who are not immune, especially since rubella is a teratogenic virus that can cause serious complications if contracted during pregnancy.

The rubella vaccine is a live attenuated virus vaccine and is given subcutaneously, which helps stimulate the production of antibodies and thereby provides immunity against future rubella infections. It is especially important for postpartum women who are planning future pregnancies to ensure they are immune, as rubella can have severe effects on the fetus during early pregnancy.

Immunization is typically done before discharge from the hospital or shortly after childbirth, reinforcing the importance of preventative measures in maintaining maternal and child health.