I used to be really prone to getting colds but in the last 7 years or so have hardly had any at all. This year, though, I've had three already - all really horrible ones that leave me feeling absolutely wretched for days.
I have a really healthy diet, exercise regularly, barely drink at all, don't have late nights and I work from home so I'm not out and about every day picking up other people's germs. Where are these colds coming from?
Being self-employed means that often I just can't afford the time to be ill - like now, when I have a whole heap of work on and am going to have to work through it when I really just want to curl up in bed.
What can I do to improve my immunity? Do things like echinacea really work?