In an accidental needle stick, an unknown quantity of blood from an AIDS patient is injected into a nurse. The most recent laboratory report on the AIDS patient shows a CD4 count of 20/µl and a viral RNA load of greater than 107copies/ml. The most appropriate course of action regarding the treatment of the nurse is to :
Monitor the nurse's blood to determine whether HIV transmission has occurred
Treat with full doses of zidovudine for 2 weeks
Add acyclovir to the 4-weeks zidovudine regimen
Administer zidovudine with lamivudine for 4 weeks