In wanting to know how long does the flu last, you're really asking a question whose pat answer is 'how long is a piece of string'.
You see, the length of any ailment is much more about you and your level of health than it is about the ailment name or condition.
Some people never get the flu, either because they are very healthy, or because their weakness doesn't lie there.
Let's focus on the former reason.
How can you get to this enviable position? The best way is to focus all your efforts on raising your immune system.
With a healthy immunity, you either will never get the flu, or will only get it briefly and mildly.
Diet is the number one reason why your immunity is currently low.
If your diet includes processed food (sugar, white flour, fast food, tins, packets, soft drinks, etc), this is a guaranteed way to achieve a nice long duration of flu.
If you eat animal protein (eggs, dairy, chicken, fish or meat) once or twice a day, this will also guarantee a nice long flu duration.
A diet rich in fresh, quality fruit and vegetables, most of it raw, on the other hand will ensure your immune system is strong, and so preventing flu or only allowing a mild version.
If you comply with the current fear of the sun, and don't get enough natural sunlight on your bare skin, this will contribute to a lengthy bout of flu.
Get out into the sun.
Just avoid long exposure during the middle of a hot summer's day.
Regular exercise, however gentle, will always contribute to better health.
Try walking to the shops.
Or get a bicycle and cycle just for the fun of it.
Many treatments for flu work by suppressing your symptoms.
This always knocks your immunity, so preventing a quick and total recovery.
It also ensures your health is low enough to succumb to the next passing bout of flu.
The homeopathic treatment for flu works by raising your immune system.
This means that not only do the effects of the flu disappear, but your energy returns quickly.
And you become a notch or two healthier, which makes the next bout less severe or less frequent.
Putting all these measures into place is not only likely to make your flu duration shorter, you are also likely to see other health improvements.
This is in natural order.
Ailments don't come on their own, so the best treatment will ensure they don't go on their own.