What is immunity? Immunity is the ability of multicellular organisms to fight off harmful microorganisms. Immunity consists of specific and nonspecific components that act as barriers and eliminators against harmful pathogens. The human body has specific immune cells called lymphocytes and T cells. Nonspecific immune cells are found in the lining of the lungs and the intestines. These cells fight off harmful agents and destroy them.
The human body contains30 trillion cells. As it ages, the immune system becomes more efficient at fighting off foreign invaders. This protection is called acquired immunity. Your body gains immunity by being exposed to foreign materials like bacteria, viruses, and fungi. The term “immunity” comes from the Latin word immunis, which means “to immunize.”
Immunity from liability comes in manydifferent forms, and some of the most common and well-known is diplomatic immunity. The 1961 Vienna Convention on Diplomatic Relations, a treaty signed by 192 countries, states that diplomatic agents enjoy immunity from civil and criminal proceedings and are exempt from business interests unrelated to their diplomatic duties. Certain public officials and employees also enjoy qualified immunity for actions undertaken in the course of their official duties. This protection is generally not extended to private companies, but it can be provided in certain circumstances.
Passive immunity is a type of acquired immunity wherein you receive readymade antibodies from someone else. Passive immunity only gives you temporary protection against an infection and does not affect your immune system’s ability to fight thepathogen in the future. Passive immunity does not develop any immunological memory, which means you cannot develop it to protect yourself against the same pathogen in the future. If you have an immunological disorder, the antibodies from your mother can be transferred to your child.