If a person shows production of interferons in his body, the chances are that he has got an infection of :

Explanation

Interferons are antiviral proteins that increase a cell's resistance to viral attacks. Since measles is a viral disease, the body produces interferons. Measles is an acute infectious eruptive viral disease of childhood caused by the RNA-containing Rubeola virus (Polynosa morbillorum). Typhoid and tetanus are bacterial diseases caused by Salmonella typhi and Clostridium tetani, respectively. Malaria is a protozoan disease caused by Plasmodium species.