From this AskReddit thread:
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slugmaniac comments on Scientists of Reddit, what's a phenomenon in your field that the average person hasn't heard of, that would blow their mind?

I wanted to let people know because my father contracted the flu two weeks ago and contracted pneumonia and he has been doing the worst I've ever seen him. There is also another person I spoke with whose father contracted the flu who took a very bad turn. If I had known, I would have had him taking anti-inflammatories the whole time. Something for everyone to be aware of during flu season (and any other systemic infection).