PLS help explain the effects of the use of antibodies in the control of a disease

i will give

Three main functions of antibodies are provided:

1) Blood and mucosal antibodies are secreted and bind to foreign substances such as pathogens and toxins, which they inactivate (neutralization).
2) Antibodies activate an additional system for lysis destruction of bacterial cells (punching holes in the cell wall).
3) The phagocytosis of foreign substances is facilitated by phagocytic cells by antibodies (opsonization).

If a virus infects a human being, it invades his host cells to survive and replicate. Once inside, the immune system cells are unable to 'see' the virus and they do not know that the host cell is infected. In order to overcome these facts, cells employ a system that allows other cells to display what lies within them they use class I molecules known as the major histocompatibility complex proteins (or MHC class I for short). When the cell is infected with a virus, fragments of proteins made by a virus will appear in those pieces of peptide.

A special immune cell known as a T-cell is circulating in search of infections. One type of T cell is called a cytotoxic T cell by killing cells infected with toxic mediators by viruses. Cytototoxic T cells have on their surface specialised proteins to help virally infected cells recognise. These proteins are called receptors of cells T. (TCRs). Each cytotoxic T cell is TCRed, with which the antigenic peptide bound with an MHC molecule is specifically recognised. When a virus peptide can be detected by the T cell recipient, its T cell is warned that it will be infected. The T cell releases cytotoxic factors to kill the infected cell, thus preventing the infection from surviving.

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