IgG and IgM differen
There are five primary immunoglobulins, igg, ga, igm, igd, and ige.
Although there overall structure is similar there quantities and functions are different. Igg is the most important from a protective standpoint. Igm is developmental the first immunoglobulin
identified in as immature creature as the lamprey. Igg is also the only immunoglobulin that can and may need to be replaced, ivgg or scgg.