Which statements explain why cholera has not been eradicated by vaccination?
1 Cholera is caused by the bacterium Vibrio cholerae.
2 Many people can have the disease, but show no symptoms.
3 People are mobile due to global trade and tourism.
4 The cholera pathogens target cells in the small intestine.
1 )
1, 2, 3 and 4
2 )
1 and 2 only
3 )
2 and 4 only
3 and 4 only
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