Microorganisms and Disease
The nature of the poliovirus gives for oral vaccination (satin vaccine) as part of the eradication programme is

small dosage of wild-type live viruses
formalin-inactivated viruses
live attenuated strains of all three immunological types
heat killed virus

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Microorganisms and Disease
A major difference between EHEC and EPEC is

EHEC secretes a Shiga-like toxin and EPEC does not
EHEC possesses a type III secretion system and EPEC does not
EPEC rearranges host cell actin and EHEC does not
EPEC passes through the placenta to infect the fetus and EHEC does not

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