Microbiology Virology f4953b19 All of the following statements are true regarding poliovirus, except: A It is transmitted by feco-oral route B Asymptomatic infections are common in children C There is a single serotype causing infection D Live attenuated vaccine produces herd immunity High-Yield Explanation Ans. is 'c' i.e., There is a single serotype causing infection There are 3 types of poliovirus which are associated with infection.