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What is Which of the following regarding oral polio vaccine (OPV) is not true? and explain in detail?
Excretion of virus in stools provides immunity to unimmunized (Herd Immunity) OPV or Sabin type vaccine: Live attenuated Given orally Immunity is both humoral and intestinal Induces antibodies quickly Prevents not only paralysis, but also intestinal reinfection Can be effectively used in controlling epidemics (herd immunity); Even a single dose elicits substantial immunity. Easy to manufacture Cheaper Required to be stored & transpoed at sub zero temperatures, unless stabilized