A Woman Has Had Intermittent and Severe Recurrences of Herpes

A woman has had intermittent and severe recurrences of herpes over the past three years. Her doctor prescribes the antiviral drug acyclovir, to be taken continually as a preventive measure. Does this woman most likely have HSV-1 or HSV-2?

A) HSV-1, because acyclovir works only on HSV-1
B) HSV-2, because acyclovir works only on HSV-2
C) HSV-1, because the recurrences have lasted three years
D) HSV-2, because the recurrences have lasted three years
E) Either, as both are equally serious and long-lasting