This is a single-arm, open label, single-dose clinical study to evaluate the safety, tolerability and efficacy of BBM-F101 injection in the pediatric Fabry disease participants up to 52 weeks after infusion, and the long-term safety and efficacy of BBM-F101 injection up to 5 years after infusion.

BBM-F101 injection is an adeno-associated virus (AAV) gene therapy product for the treatment of pediatric Fabry disease.

Inclusion Criteria:

1. The participant's legal guardian fully understands the objectives, nature, methods and potential risks of the study and signs a written informed consent; If the participant is >= 8 years old, the participant must also agree to participate in the study and sign a written informed consent;
2. Decreased α-Gal A (α-galactosidase A) and confirmed diagnosis of Fabry Disease by genetic testing;
3. Males or females aged ≥7 years and <18 years old;
4. Acceptable eGFR (estimated Glomerular Filtration Rate) result in screening period;
5. Participants had at least one of the clinical manifestations for Fabry disease;
6. Acceptable capsid antibody titers;
7. Acceptable anti α-Gal A antibody titers;
8. Acceptable laboratory values;
9. Participant's legal guardian and participant with good cooperation and compliance;
10. Use of reliable contraception methods during the study for adolescence.

Exclusion Criteria:

1. Positive for hepatitis B surface antigen (HBsAg) or hepatitis B virus DNA (HBV-DNA), positive for hepatitis C virus RNA (HCV-RNA), positive for HIV or syphilis;
2. Have potential liver diseases;
3. Heart failure and severe arrhythmias;
4. Severe allergic reactions for enzyme replacement drugs or other medications;
5. Acute/chronic infections;
6. End-stage renal disease;
7. Have a vaccination history within 30 days prior to screening, or have a vaccination plan during the screening period and the main study period;
8. Have received gene therapy or used other investigational drugs within four weeks prior to dosing;
9. Other conditions that make the participant not eligible for the study according to the investigator.