Myeloma and the Immune System

I thought I`d explain a bit around Myeloma and how it has effected my immune system. I hope this will help people understand why I am shielding.
The immune system has a number of parts, the bits I am going to mention are the innate, which relate to white blood cells, and the acquired imune system, which comes from exposure to pathogens.
The only part that of the immune system that is effect by Myeloma is the acquired immune system. The acquired immune system produces antibodies that neutralise antigens made by pathogens. The antibodies are made by plasma cells. With my Myeloma my plasma is not making IgG antibodies which are the main antibodies that protect against bacterial and viral infections.
Therefore in times of COVID it seems sensible to keep away from any source of infection..