Most colds will clear up within a week or so. Influenza is a more serious illness, and usually brings with it fever, chills, muscle aches, and sometimes back pain, in addition to cold symptoms. The flu typically comes on suddenly and can lead to secondary infections, such as bronchitis and pneumonia, which require treatment with antibiotics. It can pose a serious health threat to the elderly. See a doctor if your fever lasts for more than three days or if your temperature is over 102?F. Never give aspirin to a child with a virus; this increases the risk of Reye's syndrome, a rare and life-threatening disease.

When you have the flu, drink plenty of liquids in order to prevent dehydration and loosen mucus in the respiratory tract, which may reduce the risk of complications, such as bronchitis.

Herbal Remedies

Garlic High hopes exist for garlic's power to boost the immune system and fight viruses. Some herbalists advise eating raw cloves at the onset of cold or flu symptoms (if you cook or dry garlic, it most likely loses its antibiotic properties). Garlic capsules are becoming increasingly popular. Look for enteric coated pills, which pass through the stomach to the small intestine without being neutralized by stomach acid--and also cut down on lingering odor. But some experts believe that covering up the smell removes some of the potency in garlic.

Echinacea In the late 19th and early 20th century this was the most widely used plant drug in the country, but only recently have scientists discovered its ability to stimulate the immune system. In at least one study, echinacea was shown to relieve the severity and duration of flu symptoms. If you have a cold or the flu, take two capsules of freeze-dried extract or a dropperful of tincture in water four times a day. To prevent an illness, take half that dose for two weeks, then discontinue for two weeks. Do not take echinacea for more than eight weeks in a row, as it may overstimulate the immune system.

Eucalyptus This is a common ingredient in vapor rubs. Put 4 drops of eucalyptus oil in a bowl of steaming water. Place a towel over your head, lean over the bowl, and inhale for a few minutes. To clear your nasal passages, breathe through your nose. This will loosen the mucus, which you can then clear by blowing your nose. To clear chest congestion, breathe through your mouth. Eucalyptus oil is not only soothing, it also kills some bacteria, helping to fight off secondary infections. Other substances to try as steams include menthol, camphor, rosemary, pine, and thyme.

Linden flowers Also called lime tree flowers, linden flowers contain mucilage, which soothes the throat. To make a pleasanttasting infusion, steep 1 to 2 teaspoons dried flowers in a cup of hot water. Strain, then drink.

Mullein This herb contains ingredients that coat and soothe sore throats. It also acts as a mild expectorant. To make a tea, pour a cup of boiling water over 3 to 4 teaspoons crushed flowers. Steep, then strain.

Tip: Mother Was Wrong

The old saying, "Feed a cold, starve a fever," can lead to trouble. Even with a fever, the body needs nourishment; fasting will only make you weaker.