This thread has just reminded me of a cold I had at the end of our last winter - people had named it the 100day cold/flu.

I got sick for about a week, started to get over it, then got sick again. The third time I got sick my work mates sent me to the doctor, convinced I was getting pneumonia or pluerisy. The doctor said she had lots of people coming in - same thing happening - they thought their immunity was low and they were getting lots of different bugs, when in fact it was the same one reinventing itself over and again!

I did as much work as possible from home, took suppressant drugs when I had to teach (so I didn't splutter over everyone), lost my voice for nearly 4 weeks in the middle of it and took 6-7 days sick leave.

Nasty nasty - hope this isn't what you are having in your winter