Which of these statements regarding surface water is incorrect?

Which of these is an important preventative measure for Cronobacter infections of infants?

Trenches in WWI were zigzagged to contain the damage if a bomb shell should enter.

Which of these is true regarding smallpox?

Information collected by the World Health Organization regarding diseases incidence and prevalence is not available to the general public for fear that it will create an economic disadvantage for the effected countries.

Clinical cases are an accurate measure of the extent of outbreaks of waterborne diseases. 

The first US city to chlorinate community drinking water was

What was the cause of the Great Stink in England?

The primary reservoirs for Vibrio cholerae are

Symptoms from Staphyloccus food poisoning occur quickly due to preformed toxin.