I'm pretty sure I was told one or two weeks before and after the infusion. Because S was already out of town last fall, I remember trying to coordinate a schedule with him.
I would definitely check as the loading doses are so close together.
I don't know if it was you tess or someone else but a recent thread addressed this and the person also said 2 weeks before or after. I was happy to know that because I had no clue it would be an issue since it's not the live vaccine anyway. I guess it has to do with building antibodies.