Has anyone receiving ivigg treatments noticed that several weeks later, severe shortness of breath? I have had GMG since 2014. Had malignant thymus gland removed in 2016. Take mestinon and imuran at present time. Have been receiving ivigg last couple of years every 6 weeks over 3 days. Have begun to notice last 3 to 4 treatments, that after 2 weeks or so, I become extremely short of breath. To the point of 02 sat being in the 70s and 80s. Anyone else taking ivigg and, having any side effects they would share, I would be grateful. Thank you.