“…Immediate AEs in adult and pediatric patients show mild flu-like symptoms, such as headache, flushing of the face, malaise, tightness in the chest, fever, chills, myalgia, fatigue, dyspnea, back pain, nausea, and tachycardia [1,3,5,13,14]. In contrast, the symptoms of delayed AEs include severe symptoms, such as acute renal failure, thromboembolic events, neurological toxicity (i.e., aseptic meningitis), hematological toxicity, dermatological toxicity, pseudohyponatremia, arthritis, and pulmonary complications [1,3,5,13,14]. Several previous studies suggested that migraine may be a risk factor for aseptic meningitis associated with IVIG [4,15,16].…”