Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

How does oral polio virus vaccine shredding in faeces give herd immunity?

  1. Apr 13, 2012 #1
    Does this mean if someone comes into contact with faecally contaminated matter of an immunised polio person, that person would also be vaccinated. Thanks :smile:
  2. jcsd
  3. Apr 14, 2012 #2
    The oral polio vaccine is a live attenuated vaccine, meaning it contains live virus passaged through cells or another organism so that it is no longer pathogenic to humans. When an individual receives this vaccine, some of the attenuated virus is passed in the feces.

    My understanding is that it is then very easy for an unvaccinated individual to come into contact with this fecal contamination and become immunized. Say for example an entire family shares the same bathroom but only one was vaccinated, the whole family would likely become vaccinated indirectly.
  4. Apr 19, 2012 #3
    Heed well the Lessons of Typhoid.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook