I ran across this thread... https://www.backyardchickens.com/forum/viewtopic.php?id=106982 while surfing around BYC. It scared the bejeegers outta me!. Then I saw this article in our "Iowa Farm Bureau Spokesman" News Paper March 2, 2011. It made me think... Yes, some folks get sick from not wearing a mask, but others don't. I wonder, is it mostly people that are raised in very clean environments that get sick? I personally don't wear a mask, but was raised in a "less than clean" environment, and have a natural resistance to most nasties. I thought that we needed this thread brought back out to circulate again, because so many of our members are city dwellers, that may have been raised without exposure to the fungus and toxins in chicken poo. Coop safety is is so very important and getting ill from keeping chickens is avoidable if one just exercises caution.