Inclusion Criteria:  Patient with Pompe Disease who has previously completed Study EFC14028, LTS13769, or ACT14132 of avalglucosidase alfa studies in France. The patient and/or their parent/legal guardian is willing and able to provide signed informed consent, and the patient, if <18 years of age, is willing to provide assent if deemed able to do so. The patient (and patient's legal guardian if patient is <18 years of age) must have the ability to comply with the clinical protocol. The patient, if female and of childbearing potential, must have a negative pregnancy test result [urine beta-human chorionic gonadotropin (β-HCG)] at enrollment. Sexually active female patients of childbearing potential and male patients are required to practice true abstinence in line with their preferred and usual lifestyle or to use 2 acceptable effective methods of contraception.  Exclusion Criteria:  Patient with life-threatening hypersensitivity (anaphylactic reaction) to one of avalglucosidase alfa's excipients. The patient is concurrently participating in another clinical study of investigational treatment. The patient has clinically significant organic disease (with the exception of symptoms relating to Pompe disease), including clinically significant cardiovascular, hepatobiliary, pulmonary, neurologic, or renal disease, or other medical condition, serious intercurrent illness, or extenuating circumstance that, in the opinion of the Investigator, precludes participation in the study or potentially decreases survival.  The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial.