Question

.............. is caused by a virus

• A. Typhoid
• B. Polio
• C. Diphtheria
• D. Syphilis

Answer 1

The correct option is B Polio

Typhoid and diphtheria are bacterial diseases caused by bacteria. Hence, option A and C are incorrect. Syphilis is a sexually transmitted infection caused by the spirochete bacterium Treponema pallidum subspecies pallidum. Hence, option D is also incorrect. Polio (poliomyelitis) is a highly infectious disease caused by a virus. It invades the nervous system and can cause irreversible paralysis in a matter of hours. Polio is spread through person-to-person contact. When a child is infected with wild poliovirus, the virus enters the body through the mouth and multiplies in the intestine. It is then shed into the environment through the faeces, where it can spread rapidly through a community, especially in situations of poor hygiene and sanitation. If a sufficient number of children are fully immunized against polio, the virus is unable to find susceptible children to infect, and dies out. Hence, option B is correct.