Texts give conflicting answers.
Thanks PGL was an old term, but still used in some circles, to indicate diffuse glandular swelling. It was not used for ARS, but usually for a transition state from asymptomatic to symptomatic disease. It was described during a time when we did not have effective therapies like we have today. It is a reflection of diffuse follicular hyperplasia of the lymph nodes. All this means is that the lymph nodes have gotten swollen because lots of t cells have been brought into the glands to trap and kill virus.