[quantumhobbit]

This. DO NOT FUCK WITH THE FLU. Seriously it can be so much worse than you think.

My wife is a surgeon and works with legitimately sick people every day. The result of which is she typically has no sympathy for me when I get sick. As in "Can you please make less noise when you are vomiting. I'm trying to sleep here". No sympathy, except when I got the flu. I've never seen her that worried, because she knew from experience that the flu can kill you.

Parent almost certainly had a cold if it was gone in 24hrs.

[brianwawok]

Many different strains of flu. A healthy adult would be expected to have a smaller reaction.

[quantumhobbit]

Depends on the strain. Some strains affect healthy adults worse than the sick. A fit 20 year old can have worse time than a sickly child or elderly person.

Look up cytokines storms. https://en.m.wikipedia.org/wiki/Cytokine_storm

A strong immune system can be a liability. When I was nearly hospitalized with the flu, I was in my late twenties and in the best shape of my life. Which is why I must repeat myself, DO NOT FUCK WITH THE FLU.