Antibody therapy is a medical treatment that uses antibodies to help the body fight diseases, especially infections and cancers. Antibodies are proteins made by the immune system that can recognize and bind to specific targets, like viruses or cancer cells. By introducing lab-made antibodies into the body, doctors can enhance the immune response, making it easier for the body to eliminate harmful invaders. This therapy has gained attention for its effectiveness in treating conditions such as COVID-19 and certain types of cancer. Researchers are continually developing new antibodies to target various diseases, making antibody therapy a promising area in modern medicine.