Final answer:
IgG is the largest group of immunoglobulins that controls bacteria attempting to enter the bloodstream. It is a major antibody responsible for fighting diseases.
Step-by-step explanation:
IgG is the largest group of immunoglobulins that controls bacteria attempting to enter your bloodstream. It is a major antibody responsible for fighting against diseases and is the main antibody of secondary responses in the blood. IgG clears pathogens from the blood, can activate complement proteins, and crosses the placenta to protect the developing fetus from diseases.