Study Style and Individuals == This prospective observational study included patients who met all the following criteria: Aged 18 years and old; Got a confirmed analysis of MM, smoldering MM (sMM), monoclonal gammopathy of clinical significance (MGCS) and systematic light string amyloidosis (AL) based on the 2014 up to date diagnostic criteria from the International Myeloma Functioning Group (IMWG) [24]; Were qualified to receive anti-SARS-CoV-2 vaccination according to IMS suggestions [24,25]; Provided written educated consent

Study Style and Individuals == This prospective observational study included patients who met all the following criteria: Aged 18 years […]