Vaccination and Immunity

Antivenin or anti-snake venom serum is the only drug that can neutralise the snake venom and the victim. It should be injected soon after the bite. They are prepared by immunising horses and mules against the venoms of various types of venomous snakes. These antivenins are prepared in India at Haffkine Institute, Mumbai and Central Research Institute, Kasauli.
So, the correct answer is option C.

Answer is "Three". The correct form of incorrect statements are:
Colostrum is rich in antibodies especially IgA.
Chikungunya is caused alphavirus and not bacteria.
In the fermentation process, beer is obtained from barley while wine is obtained from grapes.

The immune system, which is made up of special cells, proteins, tissues, and organs, defends people against germs and microorganisms every day. In most cases, the immune system does a great job of keeping people healthy and preventing infections. But sometimes problems with the immune system can lead to illness and infection. The immune system is the body's defense against infectious organisms and other invaders. Through a series of steps called the immune response, the immune system attacks organisms and substances that invade body systems and cause disease.  antibodies can activate a group of proteins called complement that are also part of the immune system. Complement assists in killing bacteria, viruses, or infected cells. All of these specialized cells and parts of the immune system offer the body protection against disease. This protection is called immunity.

Antibodies (also called immunoglobulins) are large proteins. They are found in the blood or other body fluids of vertebrates. Antibodies are the key element in the adaptive immune system. The antibody recognizes a unique part of the foreign target called an antigen. It is used by the immune system to neutralize pathogens such as pathogenic bacteria and viruses. Antibody is produced by plasma cells. Antibodies can occur in two physical forms, a soluble form that is secreted from the cell to be free in the blood plasma, and a membrane-bound form that is attached to the surface of a B cell and is referred to as the B-cell receptor (BCR). 

Clone of B-cells is called as plasma cells which produce antibodies. Helper T-cells secrete IL-2 (interleukin-2) which stimulate B cells to produce antibodies. For example iInjection of snake antivenom against snake bite that provides artificially acquired passive immunity. Thus, the correct answer is option A.

An antibody is a type of proteinaceous substance produced by the body's immune system when it detects harmful substances called antigens. Examples of antigens include microorganisms (bacteria, fungi, parasites and viruses) and chemicals. Each type of antibody is unique and defends the body against one specific type of antigen.

During an active immune response, the body can produce a massive number of antibodies to combat pathogens. The estimate of 20 trillion is generally cited in immunological literature regarding the total number of antibody molecules produced daily.

Immunoglobulin A is an antibody that plays a crucial role in the immune function of mucous membranes. The amount of IgA produced in association with mucosal membranes is greater than all other types of antibody combined. It is the main immunoglobulin found in mucous secretions, including tears, saliva, sweat, colostrum and secretions from the genitourinary tract, gastrointestinal tract, prostate and respiratory epithelium. It is also found in small amounts in the blood. Hence it provides immunity to the digestive tract as it is made up of a mucous membrane.

A. Anti-snake venom is made by collecting venom from the snake and injecting small amounts of it usually into a horse. The antibodies that form in the horse blood are then collected and used to treat a snake bite case by injecting directly to the affected person.
B. Antibodies against smallpox are produced by B-lymphocytes.
C. Antibodies contain 2 light chains and 2 heavy chains.
D. Rejection of a kidney graft is a function of T-lymphocytes.

Active immunity is the antibody response produced by the body when exposed to pathogens, vaccines etc. It is a long lasting immunity and has no side effects as these are WBCs produced by the body. 

The immunosuppressive drugs are given to treat individuals with autoimmune disorders and to suppress immunity in order prevent host immune responses against antigens on the transplanted organ, thereby avoiding rejection. There are various kinds of immunosuppressive drugs; some drugs like Calcineurin inhibitors act on some of the immune cells which synthesize the receptors for antigen binding. None of the immunosuppressive drugs acts against antigens. However, use of the immunosuppressive drugs pose a risk of infection because they don't specifically inhibit certain cells that cause autoimmunity or transplant rejection, they inhibit the entire immune system making us vulnerable to infections. Thus, the correct answer is option D.

Researchers have utilized plant-based platforms to develop vaccines for various viruses, including Zika, by expressing viral proteins in plants.

Antibodies are specialized proteins produced by B-lymphocytes within the human body as part of the adaptive immune response to identify and neutralize pathogens.