How does that work?
CO is produced by incomplete oxidation of carbon. Are you saying that the flu causes humans to do that metabolically, thus poisoning themselves?
I doubt such a theory. If it were true, we'd all have heard about it long ago.
I think he was playing on words. Notice he wrote: flue, which is the vent that one opens in the fireplace when burning logs there.
Carbon monoxide poisoning is one of the side effects of a bad flue.
How does that work?
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It’s his way of being funny on a very serious topic. Flu=bug; Flue=stovepipe.