Immunity

Immunity is the body's ability to resist infection, resulting from the presence of antibodies and white blood cells (leukocytes) circulating in the blood. Antibodies are produced specifically to fight antigens formed in the body during various diseases. The formation of active immunity is observed when the body’s own cells produce and remain capable of producing antibodies that fight a developing disease or a small amount of an infectious agent introduced into the body (see Immunization). Passive immunity, which is extremely short-lived, occurs as a result of the introduction into the human body of ready-made antibodies contained in immune serum taken from another person or animal that is already immune to the disease. For several weeks after birth, infants' bodies have passive immunity to some common diseases due to the presence of small amounts of antibodies transferred from maternal blood and colostrum. See also Immune reaction.

Immunity is the body's ability to resist various infections and diseases, which arises as a result of the presence of antibodies and leukocytes in the blood. Antibodies produced by the body fight antigens and prevent the development of the disease. Active immunity occurs when the body's own antibodies remain capable of fighting a new infection or disease. Passive immunity, which is very short-lived, appears as a result of the introduction of ready-made antibodies into the blood of humans or animals that have immunity. Infants have passive immunity due to small amounts of antibodies received from the mother through the placenta or breast milk. Overall, immunity plays an important role in protecting the body from various infections and diseases, and maintaining it is an important aspect of health.

Immunity is the body's ability to resist infections that may occur in the presence of circulating antibodies and white blood cells in the blood. These cells resist antigens produced in the body during various diseases.

The body's immune response to disease can be divided into two forms: passive