primary immunodeficiency syndrome
"What a savior!  After enduring 6 months on Privigen (low trough level after).  Switched to Hizentra, more side effects and infections like I was on nothing, except the side effects were unbearable!  I'm on my second month of Cuvitru and had no idea that you could feel so well after an subcutaneous immunoglobulin (SCIg) replacement.   I have energy, my sinus infection is FINALLY getting better, almost zero side effects.  I love Cuvitru and it has changed my life!"