Vitamin C positively affects the respiratory system, but oranges can't cure your cold. The amount of vitamin C needed to affect your symptoms is available only from supplements.

If you have no appetite after stomach flu, when you feel better, drink lots of fluids and eat nutritious foods containing protein, probiotics and electrolytes that will help you recover quickly.

Influenza, or the flu, spreads from one person to another because millions of new viruses are shed during the illness that can then infect others.

More than 40 percent of people who receive the flu shot experience side effects such as injection site pain, a low-grade fever, a cough or a runny nose. These symptoms are almost always mild and rarely last longer than a day or two.

The influenza virus, conversationally called the flu, is an illness that's highly contagious and causes a number of different symptoms. There are many different types, or strains, of the influenza virus.

Influenza B is a viral infection that attacks parts of the respiratory system such as the nose, throat and lungs, according to MayoClinic.com. There are three types of influenza viruses: A, B and C.

Influenza, or the the flu, is a contagious respiratory illness caused by an airborne virus. Here are influenza A symptoms to look out for.

The flu is caused by viruses in the family Orthomyxoviridae. Influenza viruses types A and B cause seasonal flu outbreaks, and the flu vaccine provides protection against both virus types.

While vigilant hand washing and receiving the flu shot are helpful in preventing the flu, no measure is 100 percent effective. According to the Centers for Disease Control and Prevention, the flu is very contagious and can even go on to cause other complications like pneumonia, ear infections and dehydration.

Treating the underlying cause is often the best way to get rid of a cough. But there are several natural ways to combat coughing, which may be used alone or in combination with other treatments.

First signs of a stomach virus involve the stomach or intestines and might include loss of appetite, nausea, vomiting and/or diarrhea.

Mucus is a vital substance that coats the mucous membranes in the body, including the lining of the lungs and airways. The appearance of phlegm, notably its color, can provide helpful clues to the nature of the cough and the underlying reason for the excess mucus production.