SC injection of VYVGART® is available as a vial or prefilled syringe and can be administered by a patient, caregiver, or healthcare professionalSAN DIEGO, June 20, 2025 /PRNewswire/ -- Halozyme Therapeutics, Inc. (NASDAQ: HALO) (Halozyme) today announced that argenx received European Commission (EC) approval of VYVGART® 1000mg (efgartigimod alfa) developed with ENHANZE®, Halozyme's proprietary recombinant human hyaluronidase enzyme (rHuPH20), for subcutaneous (SC) injection as a monotherapy for the treatmen ...