Can it be argued that passive immunity is always artificial?

There are two types of immunity: natural and artificial. They are both active and passive. Natural passive immunity is the presence of antibodies against certain diseases that a child has from birth. Such immunity is also called hereditary. Artificial immunity of a passive type is the introduction into a sick organism of serum that has antibodies to this virus. It is produced from the blood of animals or humans that are immune to disease. Therefore, it cannot be argued that passive immunity is always artificial.