I had the flu for a full week in November (my god, that was worse than anything else I have ever experienced). 3 weeks later, I had the same aches, headache, for about 2 days. It wasn't as bad and I was able to work.
I got the flu shot in Nov. and haven't come down with the flu so far. I do have a cold now but at least it's not the flu. This is the first time I got the shot...my daughter got one too.