It can be found in some animal-based foods in its pre-made form, or found in plants in the form of beta-carotene -- a compound your body digests to form two vitamin A molecules. Yellow and dark green vegetables and fruits are good sources of the carotenes, including beta-carotene.
With the flu, you may feel very weak and fatigued for up to two or three weeks. You'll have muscle aches and periods of chills and sweats as fever comes and goes. You may also have a stuffy or runny nose, headache, and sore throat.
Types of flu - A can affect humans as well as animals, B is so far only present in humans, type C is a mild version of the flu which also affects both, and then there's bird flu, which is the one we don't want - thats H5N1. It takes about 7 up to 14 days to get over the main illness. There's still considerable weakness that can last for a few weeks after. Most people don't feel 100% until about 3-5 weeks have passed. Rest is the most important thing you can do. Taking vitamin C, eating soups and easy foods, eating fruits all helps. Keep warm - even a small chill can lengthen the time of recovery. And do not do any physical exercise - and especially do not overexert yourself.