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.
So it's possible to pass the flu on before you even know you're sick. Flu epidemics often start in schools and then move quickly through a community as students spread the virus to family members and people around them. How Do I Know if I Have the Flu? Flu symptoms appear anywhere from 1 to 4 days after a person has been exposed to the virus. The main symptoms of flu are: headache; sore throat; fever; chills; muscle aches; stuffy nose; dry cough; Someone with the flu may have a high fever ...