This study is a prospective observational study. We aim to investigate the safety and efficacy of inactivated SARS-CoV-2 vaccine between immune-related myopathy (myasthenia gravis and inflammatory myopathy) patients and health controls. The main study factors include adverse events following immunization (AEFI), serum specific antibody (Acetylcholine receptor (AChR) antibody, Anti-MuSK (muscle-specific kinase) antibody, myositis antibody) and virus neutralizing antibody titers.

Inclusion Criteria:

1. Complete behavioral ability
2. Voluntary willingness to vaccinate
3. Clinically confirmed immune-related myopathy (myasthenia gravis and inflammatory myopathy) and immune-related myopathy (myasthenia gravis and inflammatory myopathy)was stable
4. Informed consent to the research

Exclusion Criteria:

1. No independent behavior ability
2. Vaccination is contraindicated
3. Other diseases that significantly affect the immune function
4. Other diseases that may significantly affect immune function are being treated
5. Vaccination contraindication was found during the study observation period
6. Other diseases that may significantly affect immune function were diagnosed during the study observation period
7. Treatments for other diseases that may significantly affect immune function were initiated during the study observation period
8. Refused regular follow-up

Immune-related myopathy (myasthenia gravis and inflammatory myopathy) patients and health controls who are willing to receive two dose of SARS-CoV-2 inactivated vaccine.

Undeicded