Good post Bonks. A quick Google search lists the 4 variables to the outcome of a host being exposed to a pathogen, in other words, will you get sick if you're exposed? This applies to ANY virus, bacteria, prion, whatever. The four variables are: route of entry, virulence(strength) of the bug,THE QUANTITY OR LOAD OF THE INITIAL EXPOSURE, and the immune status of the host. The perfect analogy is the ? of "Did you get your wife or girlfriend pregnant last night?" Route of entry?-we won't go there. Virulence of the bug-i.e. strength of your swimmers. QUANTITY OR LOAD OF INITIAL EXPOSURE- self explanatory. Immune status of host-what time of the month is it? Assuming a "normal" route of entry, the only variable you can control is number 3. Now, let's use the flu at school example. An apple being passed around and kids taking a bite till it's gone(foodplot)vs. a giant all day sucker at the front door that every kid sucks and slobbers on as they walk in(mineral block) it seems to me the best odds of exposure to the bug AND getting a big dose would be the all day sucker. Everyone on here is right when they say there's no proof on how this spreads but if we can control ONE variable, this seems like the obvious one to try. OK dedgeez, fire away.