Well, that question is very difficult to answer and should be considered based on the individual’s health and age.  Before you make that decision I think it would be advisable to consult with your physician. However, there are some very excellent natural alternatives to support our immune system and strengthen our resistance against colds and flu. 

There are 2 clinically studied herbs that have a remarkable effect in shortening the duration and severity of a cold.  In most cases in the study, participants were able to reduce the cold and flu significantly within 24 to 48 hours.  The herbs that I take based on the clinical research are pelargonium and andrographis.  I would look for a formula containing these two herbs and take the recommended dosage based on the manufacturers label. You can even double or triple the dosage for more effective results without fear of side effects. 

Experts also believe that vitamin D3 can prevent and abort 90% of influenza.  It might be of great benefit since vitamin D3 is such a miracle supplement.  Have your physician check your vitamin D levels.  You probably would want them in the range of at least 60 nanograms per milliliter or over.  For very short periods of time it doesn’t hurt to take 5,000 to 10,000 IUs of vitamin D3.  Considering that if we were able to spend about 20 minutes in the sun and at least 50% exposed, we would produce 20,000 IUs of vitamin D3.