Dr. Ziv Bar, regional manager of the alternative medical clinics of the Clalit Health Fund, said Sunday that diet and exercise are key to facing the winter in a healthy way. A diet rich in orange vegetables and roots served hot is important for body heat. Spices can enhance the effect. Regular physical activity is good for circulation.

Vitamin C is good for general health, although there are arguments as to whether it can prevent winter illnesses. While supplements may be needed for citrus and tropical fruits and vegetables such as peppers and  broccoli, too much Vitamin C can be harmful.

As for the flu, homeopathic preparations such as Oscillo and Influheel can be used in a preventative way and to fight a disease, even if it strikes.