If a person shows the production of interferons in his body, chances are that he is suffering from
measles
Measles is a viral disease caused by rubeola virus. Interferons are proteins that increase the resistance of cells that are attacked by viruses by unmasking genes synthesizing antiviral proteins. Thus, a person suffering from measles shows the production of interferons in his body. Anthrax and tetanus are bacterial diseases and malaria is a protozoan disease.