My MIL does this very often.
Me: "Hi, how are you?"
MIL: "Oh I had the 'flu earlier this week"
AIBU to think that if you really had the 'flu, she's still be very poorly just 3-4 days later? She does this to me too - I had a case of the sniffles, nothing more than that, then she's all aghast and delares that I too, have the 'flu
I know she doesn't mean any harm, but this detracts from the poor old so and sos that really do suffer from 'flu [sigh] - in the same way that I roll my eyes when someone tells me that they have a migraine when all they really have is a headache. Grr!