IgG4 response is how your body would typically treat things like allergens that are basically harmless and don't need a full immune response. Covid needs a full

IgG4 response is how your body would typically treat things like allergens that are basically harmless and don't need a full immune response. Covid needs a full immune response, and an IgG4 response suppresses that. You don't want your body to treat a virus the same way it treats pollen.