My ds8 just received his second round (in almost 3 years) of IVIG with Dr. L last week, 5/26 & 5/27/13. He as had a low-grade fever since first day of infusion (99.2 - 100.6). My question is - how long should this last? He didn't have a fever 3 years ago after treatment. There are no other signs of infection. Nurse who administered infusion says this is normal. He was pre- medicated with Sol-u-medrol, Benadryl, Advil and Zofran. He also had a pretty bad reaction on day 4 after infusion. Severe headache, nausea, vomiting and fever. He still continues to have the headache and fever. He weighs 63 lbs. and I gave him five 16.9 oz bottles of water the day before, during, and 3 days after treatment. Am I missing something?