Obviously (steam != grain dust) but when you combine the two (steam + grain dust) = bad Joojoo. However that would be a dough in concern, for which I wear a mask.
The steam is carrying other things besides water such as wort sugars/proteins and hop material albeit at the microscopic level. I’m sure if there were bacteria and viruses in the grains themselves these would also propagate through the wort to the boil kettle and whether dead/alive would be present in the steam.
Obviously we’re not dealing with toxic waste but might be a worthwhile piece of knowledge to have.
Wouldn’t a vat of Pappy really just be a vat of pre-barrelled Weller? I’m ok with it either way, but if it’s a vat of Pappy I want it to be a slow death so I can enjoy it.
A brewer in the SF east bay fell into a kettle of boiling wort in 1901. Apparently, his system was gravity fed and he somehow fell in while cleaning the tun.