My son had an IVIG treatment 2 weeks ago and now has strep. I just don't get it. He is homebound. Is he getting strep because someone in the family has been around a person that has strep. Are we bringing it home to him or is the IVIG lowering his immune system. He just had a penicillin shot yesterday morning and he woke up with a fever this morning. I took him into the doctor and he tested positive. Is it normal to get strep while doing monthly IVIG treatments? His vocal tic, headache and tremors are much worse. I just want this nightmare to go away.