An Antigen.
When a cell is infected with a virus, the cell secrets interferon to help the other cells to resist to this virus. Hope it helps!!
Antibodies.As antibodies are produced, the body keeps a "record" of them and you will have developed an immunity to that specific virus in people with an otherwise healthy immune system. See more information below on how the immune system works.
Antibodies are cells that help the immune system fight off virus and sometimes bacteria. Vaccines are created from the antibodies of viruses that host them. For example a flu vaccine is made of the antibodies of various flu viruses. With the exception of the Human Immunodeficiency Virus, or HIV, a typical virus only lasts only a couple of days and give off antibodies for your body to work with its white blood cells to fight infection. When a person becomes ill even with a mild cold your body immidiatly creates anti bodys from the white blood cells. This anti bodys mould themselvs around the bad bacteria and engulf it. the white blood cells then know that if the same bacteria returns it can be faught off straight away.
A vaccination is usually a dead virus that has been administered at a specific dosage to trigger the body to produce antibodies. As a result of this production, the body will recognize the same virus in the future and "attack" it and kill it before it can make the body sick. A vaccine contains complete or partial microbes or the toxins they produce. It stimulates the immune system to raise antibodies against the antigens on the disease carrying organisms. A pathogen against which the body has been vaccinated alerts memory cells so causing the immune system to launch an instant defence.
Antibodies to the AIDS virus indicates the person is HIV positive.
Yes, it is possible to have antibodies for herpes without actually having the virus. Antibodies can be present in the body as a result of previous exposure to the virus or through vaccination.
An antigen stimulates the production of antibodies. These are either naturally acquired, like from mother to baby (via breast feeding and within the womb). Actively acquired, like you get chicken pox (varicella) and your body fights it off, but because your body has seen the virus it now knows how to fight it. There is also Passively Acquired immunities which are acheived via immunizations where a "dead" or small amount of virus is injected into your body so that your immune system can recognize it and know how to fight it if exposed. An antibody is a "memory cell" it identifies and kills the invader that it has seen before. HIV/ AIDS interrupts that process because it enters the nucleus and "takes over" the cells that identify the invaders... it's kind of a "smart virus".
HIV, human immunodeficiency virus, is the virus that attacks the cells in the immune system that produce antibodies.
A vaccine introduces a harmless part or a weakened form of a virus into the body, prompting the immune system to recognize it as a threat. This exposure stimulates the production of specific antibodies and activates immune cells, preparing the body to respond effectively if it encounters the actual virus in the future. By "training" the immune system in this way, vaccines enhance its ability to recognize and combat the virus more efficiently, thereby providing immunity.
the examination of blood by various techniques in order to demonstrate either yellow fever viral antigens (the part of the virus that stimulates the patient's immune system to respond) or specific antibodies
Viral Infections are diagnosed by the presence of the immune systems production of antibodies, viral fighting cells produced specifically for that specific virus.
HIV (Human Immunodeficiency Virus) attacks the T cells, which are a type of immune cell that plays a crucial role in coordinating the immune response, including the production of antibodies. By destroying these cells, HIV weakens the immune system's ability to fight infections effectively.