With reference to monoclonal antibodies, often mentioned in news, consider the following statements: I. They are man-made proteins. II. They stimulate immunological function due to their ability to bind to specific antigens. III. They are used in treating viral infections like that of Nipah virus. Which of the statements given above are correct?

Monoclonal antibodies (mAbs) are laboratory-produced (man-made) proteins designed to mimic the immune system's ability to fight pathogens, so statement I is correct. They bind to specific antigens on pathogens or diseased cells, stimulating or replicating immunological responses, so statement II is correct. Monoclonal antibodies such as m102.4 have been used experimentally to treat Nipah virus infections, and mAbs are widely used in treating various viral diseases (e.g., COVID-19, Ebola), so statement III is correct. All three statements are correct.