@ Kurt Guntheroth
"There is always a thing that kills the most children, and we are negligent not to work to eliminate whatever that thing is from childrens' environments."
Respectfully, Kurt, I would change your statement to "...we are negligent >>not to teach them to be cautious and respect<< whatever that thing iss."
The argument that "There is always a thing that kills the most children" and it must be removed from the environment may have a superficial appeal, but the logical outcome of that policy is a populace who has never learned the concept of risk asessment. If anything that poses a risk is removed from a person's environment before s/he has a chance to learn how to judge its likelihood and its potential effects, it is impossible for that person, later - when in an environment where that item has NOT been removed - to accurately judge whether the item is a threat and how much of one it is. The only response that we could reasonably expect that person to display is either total obliviousness or unreasoning fear.
(Now, this seems to be the attitude that certain governments which shall remain nameless seem to WANT in their populations - unreasoning fear of the, statistically, incredibly small possibility of being caught in a terrorist attack, and obliviousness to a ubiquitous surveillance state - but we won't go there right now.)
Since your statement that "There is always a thing that kills the most children, and we are negligent not to work to eliminate whatever that thing is from childrens' environments." does not seem to indicate that there is or should be any limit to that effort, then carrying the policy to its logical conclusion leads to the likelihood of exerting draconian measures to remove statistically-insignificant threats.
Eventually you are led to the realizatiuon that other people can carry potentially fatal diseases, so it's best to keep the child isolated from other human beings. Possibly taught via TV (well-vented to the outside of the child's environment, of course, as some of the materials used in televisions are quite toxic)...