Every autumn, vaccines against the viruses that are expected the following winter are produced. Immunization may be offered to high risk groups. However, the vaccinations give protection only against the particular viruses, not against other strains of flu - or against common colds.

LARYNGITIS
Inflammation of the larynx (voice-box), usually caused by infection and resulting in hoarseness. Laryngitis may be acute, lasting only a few days or chronic, persisting over a period of time.

Causes
Acute laryngitis is usually caused by a viral infection, such as a cold, but it can also be due to an allergy to a drug, pollen, or some other substance.
Chronic laryngitis may be caused by overuse of voice, by violent coughing, by irritation due to tobacco smoke, alcohol, fumes, or by damage during surgery.

Symptoms and Signs
Hoarseness is the most common symptom and may progress to loss of voice. There may also be pain or a feeling of discomfort in the throat (especially during swallowing) and a dry, irritating cough. Laryngitis caused by a viral infection is often accompanied by fever and a general feeling of illness.