Revised SPC: Hizentra (human normal immunoglobulin) 200 mg/ml solution for subcutaneous injection

Section 4.2 advises more than one infusion device can be used simultaneously. The amount infused at a particular site may vary: In infants and children, infusion site may be changed every 5-15ml. There is no limit to the number of infusion sites but should be at least 5cm apart.

Source:

electronic Medicines compendium