It doesn't actually say that all of these kids remained symptom free. I only skimmed, but one shows a kid who kept getting strep with re-emergence of symptoms each time (patient E). After IVIG, at every new strep infection the ocd returned and the child went on on a treatment dose of augmentin for up to a month. It looks like the kid was on prophylactic antibiotics, too but was getting new strep infections/symptom re-emergence anyway. That's not to say that the IVIGs weren't beneficial or positive. But I wouldn't call this 100% symptom free since the child obviously still has PANDAS and continues to become symptomatic sporadically even while continuing on daily antibiotics.